TERT and esophageal squamous cell carcinoma: For the TERT rs13172201 SNP, a significantly elevated risk of ESCC associated with the CT or TT genotype was observed among nonsmokers (OR = 1.82, 95% CI = 1.41-2.33, P = 2.8×10-6), but not among smokers (OR = 1.20, 95% CI = 0.97-1.49, P = 0.090).