a positive trendP = 0.063
2016 ), we observed a positive trend between motif length and functionality of the mSTRs ( R 2 = 0.74, P = 0.063) ( Supplemental Table S3 ), with dinucleotide repeats being the least likely class of STRs to act as mQTLs (odds ratio 0.76, Fisher's exact test P < 0.0001) ( Supplemental Fig.