Hypersecretory Villous Adenoma as the Primary Cause of Intestinal Intussusception and Mckittrick-Wheelock Syndrome - Susana Sanchez Garcia; Pedro Villarejo Campos; Maria del Carmen Manzanares Campillo; Aurora Gil Rendo; Virginia Muñoz Atienza; Esther Pilar García Santos; Francisco Javier Ruescas García; Jose Luis Bertelli Puche (Canadian Journal of Gastroenterology)