HLA-DQA1 and sarcoidosis: HLA-DRB1*01:01, HLA-DQA1*03:01, and HLA-DQB1*03:02 may confer protection against sarcoidosis: frequency of HLA-DRB1*01:01 decreased in the patients 2.5 times compared with the healthy control subjects, HLA-DQA1*03:01 dropped two times, and HLA-DQB1*03:02 4.5 times.