Follow-Up of Selective Endoscopic Ultrasonography and/or Endoscopic Retrograde Cholangiography Prior to Laparoscopic Cholecystectomy: A Prospective Study of 300 Patients - Berdah, S. V.; Orsoni, P.; Bege, T.; Barthet, M.; Grimaud, J.-C.; Picaud, R. (Endoscopy, 2001)