title: Risk factor analysis for cholangiocarcinoma: limitations of cross-sectional study.
authors: Teh-Ia
authors: TI
authors: Huo
authors: Shou-Dong
authors: SD
authors: Lee
authors: Jaw-Ching
authors: JC
authors: Wu
mesh_terms: D001650:Bile Duct Neoplasms / Q000453:epidemiology*; D001653:Bile Ducts, Intrahepatic; D018281:Cholangiocarcinoma / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D006801:Humans; D012307:Risk Factors