Moreover, the allelic, heterozygous and dominant models of PD-1.3 were remarkably linked with lower risk of BCC (A vs. G: OR = 0.61, 95% CI = 0.39-0.95, P = 0.028; GA vs. GG: OR = 0.58, 95% CI = 0.35-0.96, P = 0.035; AA+GA vs. GG: OR = 0.58, 95% CI = 0.36-0.94, P = 0.028, Supplementary Table 3). The gene discussed is PDCD1; the disease is skin basal cell carcinoma.