HLA-DRB1 and sarcoidosis: Grosser et al. found that using HLA-DRB1 alleles in combination with M. tuberculosis status enabled the authors to predict the sarcoidosis phenotype: sarcoidosis cases with either HLA-DRB1 * 03 or -DRB1 * 04 allele and the absence of M. tuberculosis DNA were associated with acute/resolved disease, while cases with HLA-DRB1 * 11, -DRB1 * 15, and the presence of M. tuberculosis DNA were associated with chronic sarcoidosis [97].