Comparisons between controls and SSc subsets showed that DPB1*03:01was significantly increased in frequency in lcSSc, dcSSc, ATA positive and ACA positive SSc, as well as in SSc with pulmonary fibrosis (PF); DPB1*13:01 showed similar increases, except not in ACA positive SSc. The gene discussed is ATM; the disease is pulmonary fibrosis.