title: [Chemical composition of gallstones not casting shadows in the x-ray picture].
mesh_terms: D002118:Calcium / Q000378:metabolism; D002769:Cholelithiasis / Q000000981:diagnostic imaging / Q000378:metabolism*; D006801:Humans; D011859:Radiography
chemical_list: D002118:Calcium
vernacular_title: Die chemische Zusammensetzung röntgenologisch nichtschattengebender Gallensteine