BTN3A2 and sarcoidosis: Our eQTL/GWAS analysis also identified rs2393915 in EAs with complicated sarcoidosis associated to BTN3A2, BTN3A3 and BTN2A3P, MHC I-associated genes; other BTNL2 polymorphisms (rs2076530, rs206530), have been previously reported associated to sarcoidosis susceptibility [26, 43, 64–69].