sample unit fragment_len_mean fragment_len_sd fq1 fq2 platform A 1 ngs-test-data/reads/a.chr21.1.fq ngs-test-data/reads/a.chr21.2.fq ILLUMINA B 1 ngs-test-data/reads/b.chr21.1.fq ngs-test-data/reads/b.chr21.2.fq ILLUMINA B 2 300 14 ngs-test-data/reads/b.chr21.1.fq ILLUMINA C 1 ngs-test-data/reads/a.chr21.1.fq ngs-test-data/reads/a.chr21.2.fq ILLUMINA D 1 ngs-test-data/reads/b.chr21.1.fq ngs-test-data/reads/b.chr21.2.fq ILLUMINA