title: Preoperative ultrasonography and prediction of technical difficulties during laparoscopic cholecystectomy.
authors.forename: I
authors.initials: I
authors.lastname: Braghetto
authors.forename: A
authors.initials: A
authors.lastname: Csendes
authors.forename: O
authors.initials: O
authors.lastname: Korn
mesh_terms: D017081:Cholecystectomy, Laparoscopic; D002769:Cholelithiasis / Q000000981:diagnostic imaging* / Q000601:surgery; D005704:Gallbladder / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D014463:Ultrasonography