Expression of miRNA and isoforms are reported in a format compatible with that used by The Cancer Genome Atlas (TCGA). The specifications of this format are available at https://wiki.nci.nih.gov/display/TCGA/miRNASeq

miRNAs.txt:
1: 	miRNA_ID: 	valid miRBASE id
2:	read_count:	raw read count
3:	reads_per_million_miRNA_mapped:	normalized expression value
4:	cross_mapped:	Is this feature cross-classified as other miRNA forms

isoforms.txt
1:	miRNA_ID:	valid miRBASE id
2:	isoform_coords:	genomic coordinates of the isoform
3:	read_count:	read_count
4:	reads_per_million_miRNA_mapped:	normalized expression value
5:	cross_mapped:	Is this feature cross-classified as other miRNA forms
6:	miRNA_feature:	 Type of miRNA feature
