HLA-DRA and sarcoidosis: Six SNPs [rs9268528 (BTNL2 promoter), rs3135351, and rs3129843 (between genes HLA-DRA and BTNL2), rs9268644 and rs3129877 (HLA-DRA intronic), rs6937545 (downstream of HLA-DRA)] were associated with the disease course of sarcoidosis (Table 2).