title: Hilar intrahepatic cholangiocarcinoma and its etiology.
mesh_terms: D002759:Adenoma, Bile Duct / Q000209:etiology*; D003003:Clonorchiasis / Q000150:complications*; D006801:Humans; D008113:Liver Neoplasms / Q000209:etiology*; D009602:Nitrosamines / Q000009:adverse effects*; D013785:Thailand
chemical_list: D009602:Nitrosamines