Frequency of gall bladder operations.
D000367:Age Factors; D002758:Cholangiography; D002763:Cholecystectomy; D002769:Cholelithiasis / Q000453:epidemiology / Q000601:surgery*; D005260:Female; D042882:Gallstones / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012737:Sex Factors