1 Department of Surgery, Riviera-Chablais Hospital (HRC), Rennaz; Department of Visceral Surgery, Lausanne University Hospital CHUV, Lausanne, Switzerland.
2 Department of Surgery, Riviera-Chablais Hospital (HRC), Rennaz, Switzerland.
3 Department of Gastroenterology, Riviera-Chablais Hospital (HRC), Rennaz, Switzerland.