All these T1D-associated cis-eQTLs were in regions where T1D-associated SNPs have previously been reported, but the cis-eQTL target was not always the same gene as that to which the SNP association in that region had been attributed.•The association of T1D with SNPs in the 12q13 region has been attributed to ERBB3. 31,32, Table S1 shows however that the strongest cis-QTL score associations with T1D in this region were for RAB5B, ERBB3, and IL-23A. The gene discussed is RAB5B; the disease is type 1 diabetes mellitus.