ADH1C and esophageal squamous cell carcinoma: Although ADH1C rs1789903 CG genotype was significantly associated with ESCC risk in the validation stage (OR = 1.58, 95% CI = 1.15–2.16, P = 0.005), rs1789903 GG genotype was not associated with ESCC risk (OR = 3.49, 95% CI = 0.94–13.02, P = 0.062).