title: A review of 814 cases of biliary tract surgery from 1957-1977.
mesh_terms: D000367:Age Factors; D000368:Aged; D001660:Biliary Tract Diseases / Q000401:mortality / Q000601:surgery; D001662:Biliary Tract Surgical Procedures; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors