HLA-DPB1 and systemic sclerosis: On the other hand, DPB1*13:01 and DPB1*03:01 were significantly increased in Chinese SSc that passed Bonferroni correction (frequency of alleles in controls vs. cases and p value were 4.48 vs. 8.73%, 0.00047, 2.81% vs. 7.69%, 5.8×10−6, respectively) (Table 1).