<tool id="bg_sortmerna" name="Filter with SortMeRNA" version="@VERSION@.5">
    <description>of ribosomal RNAs in metatranscriptomic data</description>
    <macros>
        <import>macros.xml</import>
    </macros>
    <requirements>
        <requirement type="package" version="@VERSION@">sortmerna</requirement>
        <requirement type="package" version="1.5">samtools</requirement>
    </requirements>
    <stdio>
        <regex match="This program builds a Burst trie on an input rRNA database"
            source="both"
            level="fatal"
            description="Buildtrie program failed to execute." />
        <regex match="The database name"
            source="both"
            level="fatal"
            description="The database ${databases} has not been preprocessed using buildtrie before using SortMeRNA." />
        <regex match="ERROR"
            source="both"
            level="fatal"
            description="ERROR" />
    </stdio>
    <version_command>
<![CDATA[
sortmerna --version 2>&1|grep 'SortMeRNA version'
]]>
    </version_command>
    <command>
<![CDATA[
    #set $ref = ''
    #set $sep=''
    #if str( $databases_type.databases_selector ) == 'history'
        #for $db in $databases_type.database_name
            #set $ref += $sep + str($db) + ',' + $os.path.splitext($os.path.basename(str($db)))[0]
            #set $sep = ':'
        #end for
    #else if str( $databases_type.databases_selector ) == 'cached_to_index'
        #for $db in $databases_type.input_databases.fields.path.split(",")
            #set $ref += $sep + $db + ',' + $os.path.splitext($db)[0] + '-reindexed'
            #set $sep = ':'
        #end for
    #else
        #for $db in $databases_type.input_databases.fields.path.split(",")
            #set $ref += $sep + $db + ',' + $os.path.splitext($db)[0]
            #set $sep = ':'
        #end for
    #end if

    #if str( $databases_type.databases_selector ) != 'cached'
        indexdb_rna 
            --ref $ref 
            -L $databases_type.seed_length 
            --max_pos $databases_type.max_pos 
        &&
    #end if

    #if str( $sequencing_type.sequencing_type_selector ) == 'paired'
        merge-paired-reads.sh
            '$sequencing_type.forward_reads'
            '$sequencing_type.reverse_reads'
            merged-reads.fastq
        &&
    #end if

    sortmerna 
        --ref $ref
        --aligned aligned
        #if str( $sequencing_type.sequencing_type_selector ) == 'paired'
            --reads merged-reads.fastq
            $sequencing_type.paired_type
        #else
            --reads '$sequencing_type.reads'
        #end if
        $strand_search
        $log
        $aligned_fastx.aligned_fastx_selector
        #if $aligned_fastx.aligned_fastx_selector == '--fastx'
            #if $aligned_fastx.other
                --other unaligned
            #end if
        #end if
        #if $report.report_type == 'best'
            @ALIGNMENTS@
            #if $report.otu.otu_map == 'True'
                --otu_map
                --id '$report.otu.id'
                --coverage '$report.otu.coverage'
                $report.otu.de_novo_otu
            #end if
            #if $report.report_best.report_best_type == '1'
                --best 1
                --min_lis '$report.report_best.report_best_min_lis'
            #else
                --best '$report.report_best.report_best_value'
                --min_lis '$report.report_best.report_best_min_lis'
            #end if
        #elif $report.report_type == 'num_alignments'
            @ALIGNMENTS@
            #if $report.report_num_alignments.report_num_alignments_type == 'other_value'
                --num_alignments '$report.report_num_alignments.report_num_alignments_value'
            #else
                --num_alignments '$report.report_num_alignments.report_num_alignments_type'
            #end if
        #end if
        -e '$e_value'
        --match '$match'
        --mismatch '$mismatch'
        --gap_open '$gap_open'
        --gap_ext '$gap_ext'
        -N $ambiguous_letter
        -a \${GALAXY_SLOTS:-1}
    #if $report.report_type != 'None'
        &&
        samtools view -@ "\${GALAXY_SLOTS:-4}" -u aligned.sam | samtools sort -@ "\${GALAXY_SLOTS:-4}" -T tmp -O bam -o '$output_bam'
    #end if

    #if str( $sequencing_type.sequencing_type_selector ) == 'paired' and $sequencing_type.paired_type != '' and $aligned_fastx.aligned_fastx_selector == '--fastx'
        &&
        unmerge-paired-reads.sh
            aligned.fastq
            '$aligned_forward'
            '$aligned_reverse'
        #if $aligned_fastx.other
            &&
            unmerge-paired-reads.sh
                unaligned.fastq
                '$unaligned_forward'
                '$unaligned_reverse'
        #end if
    #end if
]]>
    </command>
    <inputs>
        <conditional name="sequencing_type">
            <param name="sequencing_type_selector" type="select" label="Sequencing type">
                <option value="not_paired">Reads are not paired</option>
                <option value="paired">Reads are paired</option>
            </param>
            <when value="not_paired">
                <param argument="--reads" type="data" format="fasta,fastq" label="Querying sequences"/>
            </when>
            <when value="paired">
                <param name="forward_reads" type="data" format="fastq" label="Forward reads"/>
                <param name="reverse_reads" type="data" format="fastq" label="Reverse reads"/>
                <param name="paired_type" type="select" display="radio" label="If one of the paired-end reads aligns and the other one does not">
                    <option value="">Leave the reads split between aligned and rejected files</option>
                    <option value="--paired_in">Output both reads to aligned file (--paired_in)</option>
                    <option value="--paired_out">Output both reads to rejected file (--paired_out)</option>
                </param>
            </when>
        </conditional>
        <param name="strand_search" type="select" label="Which strands to search">
            <option value="">Search both strands</option>
            <option value="-F">Search only the forward strand (-F)</option>
            <option value="-R">Search only the reverse-complementary strand (-R)</option>
        </param>
        <conditional name="databases_type">
            <param name="databases_selector" type="select" label="Databases to query"
                help="Public rRNA databases provided with SortMeRNA have been indexed. On the contrary, personal databases must be indexed each time SortMeRNA is launched. Please be patient, this may take some time depending on the size of the given database.">
                <option value="cached" selected="true">Public pre-indexed ribosomal databases</option>
                <option value="cached_to_index">Public ribosomal databases to index with non default parameters</option>
                <option value="history">Databases from your history</option>
            </param>
            <when value="cached">
                <param name="input_databases" label="rRNA databases" type="select" display="checkboxes" multiple="true">
                    <options from_data_table="rRNA_databases" />
                    <validator type="no_options" message="Select at least one database"/>
                </param>
            </when>
            <when value="cached_to_index">
                <param name="input_databases" label="rRNA databases" type="select" display="checkboxes" multiple="true">
                    <options from_data_table="rRNA_databases" />
                    <validator type="no_options" message="Select at least one database"/>
                </param>
                <expand macro="db_prep"/>
            </when>
            <when value="history">
                <param name="database_name" type="data" format="fasta" multiple="true" label="rRNA databases" help="Your databases will be indexed first, which may take up to several minutes."/>
                <expand macro="db_prep"/>
            </when>
        </conditional>
        <!-- Outputs -->
        <conditional name="aligned_fastx">
            <param name="aligned_fastx_selector" type="select" label="Include aligned reads in FASTA/FASTQ format?">
                <option value="--fastx">Yes (--fastx)</option>
                <option value="">No</option>
            </param>
            <when value="--fastx">
                <param argument="--other" type="boolean" truevalue="True" falsevalue="False" label="Include rejected reads file?"/>
            </when>
            <when value=""/>
        </conditional>
        <param argument="--log" type="boolean" checked="false" truevalue="--log" falsevalue="" label="Generate statistics file" help="Generates statistics for the rRNA content of reads, as well as rRNA subunit distribution">
        </param>
        <conditional name="report">
            <param name="report_type" type="select" label="Alignment report">
                <option value="None">Do not report alignments</option>
                <option value="best">Report best alignments per read reaching E-value</option>
                <option value="num_alignments">Report first alignements per read reaching E-value</option>
            </param>
            <when value="None"/>
            <when value="best">
                <expand macro="output_alignments"/>
                <conditional name="otu">
                    <param name="otu_map" type="select" label="Pick OTUs?">
                        <option value="True">Yes</option>
                        <option value="False" selected="true">No</option>
                    </param>
                    <when value="True">
                        <param argument="--id" type="float" value="0.97" label="Percentage id similarity threshold" help="The alignment must still pass the E-value threshold" />
                        <param argument="--coverage" type="float" value="0.97" label="Percentage query coverage threshold" help="The alignment must still pass the E-value threshold" />
                        <param name="de_novo_otu" type="boolean" truevalue="--de_novo_otu" falsevalue="" label="FASTA/FASTQ file for reads matching database below percentage id" help="--de_novo_otu" />
                    </when>
                    <when value="False"/>
                </conditional>
                <conditional name="report_best">
                    <param argument="report_best_type" type="select" label="Number of searched alignments" help="Only the best alignment is reported (--best)">
                        <option value="1" selected="true">Only one high-candidate reference sequence is searched for alignments (fast). The high-candidate sequences are determined heuristically using a LIS of seed matches)</option>
                        <option value="other_value">A custom number of reference sequences are searched for alignments (speed decrease for high value)</option>
                    </param>
                    <when value="1">
                        <param name="report_best_min_lis" type="integer" min="0" max="100" value="2" label="Number of longest LIS an alignement needs to be searched" help="The alignements having the first INT longest LIS. LIS stands for Longest Increasing Subsequence, it is computed using seeds' positions to expand hits into longer matches prior to Smith-Waterman alignment. (--min_lis)"/>
                    </when>
                    <when value="other_value">
                        <param name="report_best_value" type="integer" min="2" max="100" value="2" label="Number of alignments to be made" help="Only the best one is reported. The computation speed decrease with high value"/>
                        <param name="report_best_min_lis" type="integer" min="0" max="100" value="2" label="Number of longest LIS an alignement needs to be searched" help="The alignements having the first INT longest LIS. LIS stands for Longest Increasing Subsequence, it is computed using seeds' positions to expand hits into longer matches prior to Smith-Waterman alignment. (--min_lis)"/>
                    </when>
                </conditional>
            </when>
            <when value="num_alignments">
                <expand macro="output_alignments"/>
                <conditional name="report_num_alignments">
                    <param name="report_num_alignments_type" type="select" label="Number of output alignments" help="(--num_alignments)">
                        <option value="0">All alignments reaching the E-value threshold are reported (very slow, this option is not suggested for high similarity rRNA databases)</option>
                        <option value="1" selected="true">The first alignment passing E-value threshold are reported (very fast, best choice if only filtering is needed)</option>
                        <option value="other_value">A custom number of alignments are made and reported (speed decrease for high value)</option>
                    </param>
                    <when value="0" />
                    <when value="1" />
                    <when value="other_value">
                        <param name="report_num_alignments_value" type="integer" min="0" max="100" value="1" label="Number of alignments to be made and reported" help=""/>
                    </when>
                </conditional>
            </when>
        </conditional>
        <param name="e_value" type="float" min="0" max="10" value="1" label="E-value threshold" help="(-e)"/>
        <param argument="--match" type="integer" min="0" max="10" value="2" label="SW score for a match"/>
        <param argument="--mismatch" type="integer" min="-10" max="0" value="-3" label="SW penalty for a mismatch"/>
        <param name="gap_open" type="integer" min="0" max="10" value="5" label="SW penalty for introducing a gap" help="(--gap_open)"/>
        <param name="gap_ext" type="integer" min="0" max="10" value="2" label="SW penalty for extending a gap" help="(--gap_ext)"/>
        <param name="ambiguous_letter" type="integer" min="-10" max="0" value="-3" label="SW penalty for ambiguous letters (N's)" help="(-N)"/>
    </inputs>
    <outputs>
        <data name="output_fastx" format_source="reads" from_work_dir="aligned.dat" label="${tool.name} on ${on_string}: Aligned reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != '' and sequencing_type['sequencing_type_selector'] != 'paired'</filter>
        </data>
        <data name="output_paired_fastx" format="fastq" from_work_dir="aligned.fastq" label="${tool.name} on ${on_string}: Aligned reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != '' and sequencing_type['sequencing_type_selector'] == 'paired' and sequencing_type['paired_type'] == ''</filter>
        </data>
        <data name="aligned_forward" format="fastq" label="${tool.name} on ${on_string}: Aligned forward reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != ''  and sequencing_type['sequencing_type_selector'] == 'paired' and sequencing_type['paired_type'] != ''</filter>
        </data>
        <data name="aligned_reverse" format="fastq" label="${tool.name} on ${on_string}: Aligned reverse reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != ''  and sequencing_type['sequencing_type_selector'] == 'paired' and sequencing_type['paired_type'] != ''</filter>
        </data>
        <data name="output_other" format_source="reads" from_work_dir="unaligned.dat" label="${tool.name} on ${on_string}: Unaligned reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != '' and aligned_fastx['other'] == True and sequencing_type['sequencing_type_selector'] == 'not_paired'</filter>
        </data>
        <data name="output_paired_other" format="fastq" from_work_dir="unaligned.fastq" label="${tool.name} on ${on_string}: Unaligned reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != '' and aligned_fastx['other'] == True and sequencing_type['sequencing_type_selector'] == 'paired' and sequencing_type['paired_type'] == ''</filter>
        </data>
        <data name="unaligned_forward" format="fastq" label="${tool.name} on ${on_string}: Unaligned forward reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != '' and aligned_fastx['other'] == True and sequencing_type['sequencing_type_selector'] == 'paired' and sequencing_type['paired_type'] != ''</filter>
        </data>
        <data name="unaligned_reverse" format="fastq" label="${tool.name} on ${on_string}: Unaligned reverse reads">
            <filter>aligned_fastx['aligned_fastx_selector'] != '' and aligned_fastx['other'] == True and sequencing_type['sequencing_type_selector'] == 'paired' and sequencing_type['paired_type'] != ''</filter>
        </data>
        <data name="output_bam" format="bam" label="${tool.name} on ${on_string}: Alignments">
            <filter>report['report_type'] != 'None'</filter>
        </data>
        <data name="output_blast" format="tabular" from_work_dir="aligned.blast" label="${tool.name} on ${on_string}: BLAST report">
            <filter>report['report_type'] != 'None' and report['blast']['blast_output'] == 'True'</filter>
            <change_format>
                <when input="aligned_blast.aligned_blast_format" value="0" format="txt" />
            </change_format>
        </data>
        <data name="output_biom" format="txt" from_work_dir="aligned_otus.txt" label="${tool.name} on ${on_string}: OTU map">
            <filter>report['report_type'] != 'None' and report['report_type'] == 'best' and report['otu']['otu_map'] == 'True'</filter>
        </data>
        <data name="output_de_novo" format_source="reads" from_work_dir="aligned_denovo.dat" label="${tool.name} on ${on_string}: De novo reads matching database">
            <filter>report['report_type'] != 'None' and report['report_type'] == 'best' and report['otu']['otu_map'] == 'True' and report['otu']['de_novo_otu'] == True</filter>
        </data>
        <data name="output_log" format="txt" label="${tool.name} on ${on_string}: Log" from_work_dir="aligned.log">
            <filter>log == True</filter>
        </data>
    </outputs>
    <tests>
        <test>
            <conditional name="sequencing_type">
                <param name="sequencing_type_selector" value="not_paired" />
                <param name="reads" value="read_small.fastq" />
            </conditional>
            <param name="strand_search" value="" />
            <conditional name="databases_type">
                <param name="databases_selector" value="history" />
                <param name="database_name" value="ref_small.fasta" />
            </conditional>
            <conditional name="aligned_fastx">
                <param name="aligned_fastx_selector" value="--fastx" />
                <param name="other" value="True" />
            </conditional>
            <param name="log" value="False" />
            <conditional name="report">
                <param name="report_type" value="num_alignments" />
                <param name="report_best_type" value="1" />
                <param name="print_all_reads" value="False" />
                <conditional name="blast">
                    <param name="blast_output" value="True"/>
                    <param name="blast_format" value="1 cigar qcov"/>
                </conditional>
                <conditional name="otu">
                    <param name="otu_map" value="False"/>
                </conditional>
            </conditional>
            <param name="e_value" value="1"/>
            <param name="match" value="2"/>
            <param name="mismatch" value="-3" />
            <param name="gap_open" value="5"/>
            <param name="gap_ext" value="2"/>
            <param name="ambiguous_letter" value="-3"/>
            <output name="output_fastx" file="test1_aligned.fastq" />
            <output name="output_other" file="test1_other.fastq" />
            <output name="output_bam" file="test1_bam.bam" compare="sim_size" delta="200" />
            <output name="output_blast" file="test1_blast.tabular"/>
        </test>
        <test>
            <conditional name="sequencing_type">
                <param name="sequencing_type_selector" value="not_paired" />
                <param name="reads" value="read_small.fasta" />
            </conditional>
            <param name="strand_search" value="" />
            <conditional name="databases_type">
                <param name="databases_selector" value="history" />
                <param name="database_name" value="ref_small.fasta" />
            </conditional>
            <conditional name="aligned_fastx">
                <param name="aligned_fastx_selector" value="--fastx" />
                <param name="other" value="False" />
            </conditional>
            <param name="log" value="True" />
            <conditional name="report">
                <param name="report_type" value="None" />
            </conditional>
            <param name="e_value" value="1"/>
            <param name="match" value="2"/>
            <param name="mismatch" value="-3" />
            <param name="gap_open" value="5"/>
            <param name="gap_ext" value="2"/>
            <param name="ambiguous_letter" value="-3"/>
            <output name="output_fastx" file="test2_aligned.fasta" />
            <output name="output_log" file="test2_log.txt"  compare="sim_size" />
        </test>
        <test>
            <conditional name="sequencing_type">
                <param name="sequencing_type_selector" value="paired" />
                <param name="forward_reads" value="forward_reads.fastq" />
                <param name="reverse_reads" value="reverse_reads.fastq" />
                <param name="paired_type" value="--paired_in"/>
            </conditional>
            <param name="strand_search" value="" />
            <conditional name="databases_type">
                <param name="databases_selector" value="history" />
                <param name="database_name" value="ref_small.fasta" />
                <param name="seed_length" value="18" />
                <param name="max_pos" value="100000"/>
            </conditional>
            <conditional name="aligned_fastx">
                <param name="aligned_fastx_selector" value="--fastx" />
                <param name="other" value="True" />
            </conditional>
            <param name="log" value="False" />
            <conditional name="report">
                <param name="report_type" value="best" />
                <param name="report_num_alignments_type" value="1"/>
                <param name="print_all_reads" value="False" />
                <conditional name="blast">
                    <param name="blast_output" value="False"/>
                </conditional>
                <conditional name="otu">
                    <param name="otu_map" value="False"/>
                </conditional>
            </conditional>
            <param name="e_value" value="1"/>
            <param name="match" value="2"/>
            <param name="mismatch" value="-3" />
            <param name="gap_open" value="5"/>
            <param name="gap_ext" value="2"/>
            <param name="ambiguous_letter" value="-3"/>
            <output name="aligned_forward" file="test3_aligned_forward.fastq" />
            <output name="aligned_reverse" file="test3_aligned_reverse.fastq" />
            <output name="unaligned_forward" file="test3_unaligned_forward.fastq" />
            <output name="unaligned_reverse" file="test3_unaligned_reverse.fastq" />
            <output name="output_bam" file="test3_bam.bam" compare="sim_size" delta="200" />
        </test>
        <test>
            <conditional name="sequencing_type">
                <param name="sequencing_type_selector" value="not_paired" />
                <param name="reads" value="test4_input.fasta" />
            </conditional>
            <param name="strand_search" value="" />
            <conditional name="databases_type">
                <param name="databases_selector" value="history" />
                <param name="database_name" value="ref_small.fasta" />
                <param name="seed_length" value="18" />
                <param name="max_pos" value="100000"/>
            </conditional>
            <conditional name="aligned_fastx">
                <param name="aligned_fastx_selector" value="" />
            </conditional>
            <param name="log" value="False" />
            <conditional name="report">
                <param name="report_type" value="best" />
                <param name="report_num_alignments_type" value="1"/>
                <param name="print_all_reads" value="False" />
                <conditional name="blast">
                    <param name="blast_output" value="False"/>
                </conditional>
                <conditional name="otu">
                    <param name="otu_map" value="True"/>
                    <param name="id" value="0.97"/>
                    <param name="coverage" value="0.97" />
                    <param name="de_novo_otu" value="True"/>
                </conditional>
            </conditional>
            <param name="e_value" value="1"/>
            <param name="match" value="2"/>
            <param name="mismatch" value="-3" />
            <param name="gap_open" value="5"/>
            <param name="gap_ext" value="2"/>
            <param name="ambiguous_letter" value="-3"/>
            <output name="output_bam" file="test4_bam.bam" compare="sim_size" delta="200" />
            <output name="output_biom" file="test4_biom.txt"/>
            <output name="output_de_novo" file="test4_de_novo.fasta"/>
        </test>
    </tests>
    <help>
<![CDATA[
**What it does**

SortMeRNA_ is a software designed to rapidly filter ribosomal RNA fragments
from metatransriptomic data produced by next-generation sequencers.
It is capable of handling large RNA databases and sorting out all fragments
matching to the database with high accuracy and specificity.

.. _SortMeRNA: http://bioinfo.lifl.fr/RNA/sortmerna/


**Input**

The input is one file of reads in FASTA or FASTQ format and any number of rRNA databases to search against.
If the user has two foward-reverse paired-sequencing reads files, they may use
the script "merge_paired_reads.sh" to interleave the reads into one file, preserving their order.

If the sequencing type for the reads is paired-ended, the user has two options under
"Sequencing type" to filter the reads and preserve their order in the file.
For a further example of each option, please refer to Section 4.2.3 in the `SortMeRNA User Manual`_.

.. _sortmerna user manual: http://bioinfo.lifl.fr/RNA/sortmerna/code/SortMeRNA-user-manual-v1.7.pdf


**Output**

The output will follow the same format (FASTA or FASTQ) as the reads. Optionally, a statistic file for the rRNA content of reads, as well as rRNA subunit distribution can be generated.


**rRNA databases**

SortMeRNA is distributed with 8 representative rRNA databases, which were
all constructed from the SILVA SSU,LSU (version 111) and the RFAM 5/5.8S
(version 11.0) databases using the tool UCLUST.

+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| Representative database  | id % | average id% | # seq (clustered) | Origin                 |  # seq (original) |
+==========================+======+=============+===================+========================+===================+
| SILVA 16S bacteria       |   85 |        91.6 |              8174 | SILVA SSU Ref NR v.111 |            244077 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| SILVA 16S archaea        |   95 |        96.7 |              3845 | SILVA SSU Ref NR v.111 |             10919 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| SILVA 18S eukarya        |   95 |        96.7 |              4512 | SILVA SSU Ref NR v.111 |             31862 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| SILVA 23S bacteria       |   98 |        99.4 |              3055 | SILVA LSU Ref v.111    |             19580 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| SILVA 23s archaea        |   98 |        99.5 |               164 | SILVA LSU Ref v.111    |               405 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| SILVA 28S eukarya        |   98 |        99.1 |              4578 | SILVA LSU Ref v.111    |              9321 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| Rfam 5S archaea/bacteria |   98 |        99.2 |             59513 | RFAM                   |            116760 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+
| Rfam 5.8S eukarya        |   98 |        98.9 |             13034 | RFAM                   |            225185 |
+--------------------------+------+-------------+-------------------+------------------------+-------------------+

id %: members of the cluster must have identity at least 'id %' identity with the representative sequence

average id %: average identity of a cluster member to the representative sequence

The user may also choose to use their own rRNA databases.

.. class:: warningmark

Note that your personal databases are indexed each time. The public ribosomal
databases are indexed when added, but they can be re-indexed with non-default indexing 
parameters. The indexing may take some time depending on the size of the given database.

]]>
    </help>

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        <citation type="doi">10.1093/bioinformatics/bts611</citation>
        <citation type="doi">10.1093/nar/gks1219</citation>
        <citation type="doi">10.1093/nar/gks1005</citation>
        <citation type="doi">10.1093/bioinformatics/btq461</citation>
        <citation type="doi">10.1038/nbt.2198</citation>
    </citations>
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