IL6R and cholangiocarcinoma: Polymorphisms: GSTO1*A140D (C419A; rs4925) and SNPs in other inflammation or cancer- associated genes (COX-2, IL6, IL6R, IL6ST, SULF1, VEGFA, WRAP53, NKG2D)Main findings:- no association between allele frequency of GSTO1*A140D variant (and SNPs of the other genes selected) and CCA risk or survival.