sample	group	r1	r2
S01	G01	three_samples_example/01_R1.fastq.gz	three_samples_example/01_R2.fastq.gz
S02	G02	three_samples_example/02_R1.fastq.gz	three_samples_example/02_R2.fastq.gz
S03	G02	three_samples_example/03_R1.fastq.gz	three_samples_example/03_R2.fastq.gz
