title: The National Cooperative Gallstone Study viewed by its investigators.
mesh_terms: D002635:Chenodeoxycholic Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D002769:Cholelithiasis / Q000000981:diagnostic imaging / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D003365:Costs and Cost Analysis; D005260:Female; D006801:Humans; D008297:Male; D011859:Radiography; D011897:Random Allocation; D014481:United States
chemical_list: D002635:Chenodeoxycholic Acid