HLA-A and systemic sclerosis: The phenotype frequencies of HLA-A*68 (P = 0.01, OR: 0.44, CI: 0.228–0.854, Pc = 0.13) and HLA- DRB1*10 (P = 0.03, OR: 0.31, CI: 0.121–0.819, Pc = 0.39), were found to be less prevalent in SSc patients than controls; however, the association did not attain statistical significance after the Bonferroni correction.