HLA-A and systemic sclerosis: The phenotype frequencies of HLA-A*24 (P = 0.004, OR: 2.03, CI: 1.238–3.335, Pc = 0.05), HLA-A*32 (P = 0.03, OR: 2.98, CI: 1.120–7.672, Pc = 0.39), and HLA-B*35 (P = 0.005, OR: 2.05, CI: 1.252–3.352, Pc = 0.11), were observed to be high in SSc patients.