Prepapillary Intradiverticular Bezoar as Cause of Obstructive Jaundice: Removed by Endoscopy - Armengol-Miró, J. R.; Villagrasa, M.; Formiguera, J.; Ramentol, F.; Prim, P.; Guardia, J.; Gomez, J. L. (Endoscopy, 1977)