Five SNPs were associated with the disease course of sarcoidosis (BTNL2 exonic SNP rs28362677, BTNL2 promoter SNP rs5007259, SNPs rs3135351 and rs3129843 between genes BTNL2 and HLA-DRA, and HLA-DRA downstream SNP rs3129877) (Table S2 in Supplementary Material). The gene discussed is HLA-DRA; the disease is sarcoidosis.