EGFR and cholangiocarcinoma: After controlling for potential confounders, patients with EGFR SNP rs2017000 GG + GA genotypes were 1.8 times more likely (OR = 1.772 95% CI = 1.137–3.885, p = 0.038), and those with GG were 1.5 times (OR = 1.530 95% CI = 1.213–2.845, p = 0.043) more likely, to develop CCA [35].