I'm trying to carry out an eQTL analysis on some TCGA BRCA data I have.

For the genotypes, I have a list of birdseed files, that each have a hybridisation reference that looks like: `WRIED_p_TCGA_143_147_150_Hahn_N_GenomeWideSNP_6_A09_799960`.

My RNA-Seq data is labelled with a portion of the sample barcodes, e.g., **TCGA.3C.AAAU** (which would correspond to the barcode **TCGA-3C-AAAU-01A-11R-A41B-07**).

For eQTL analysis, I need to pair up a genotype with the corresponding expression values, but I need a file providing the mappings. As per [the TCGA Website][1], I feel like its probably a SDRF file I need, but I'm not entirely sure about this, and I can't find one through the TCGA data portal in any case.

Could someone lend me some guidance?

 [1]: https://wiki.nci.nih.gov/display/TCGA/Sample+and+Data+Relationship+Format
See if either of these help.

sdrf from Broad: https://tcga-data.nci.nih.gov/tcgafiles/ftp_auth/distro_ftpusers/anonymous/tumor/brca/cgcc/broad.mit.edu/genome_wide_snp_6/snp/broad.mit.edu_BRCA.Genome_Wide_SNP_6.mage-tab.1.2023.0/broad.mit.edu_BRCA.Genome_Wide_SNP_6.sdrf.txt

sdrf from UNC: https://tcga-data.nci.nih.gov/tcgafiles/ftp_auth/distro_ftpusers/anonymous/tumor/brca/cgcc/unc.edu/illuminahiseq_totalrnaseqv2/totalrnaseqv2/unc.edu_BRCA.IlluminaHiSeq_TotalRNASeqV2.mage-tab.1.1.0/unc.edu_BRCA.IlluminaHiSeq_TotalRNASeqV2.1.1.0.sdrf.txt