1 Department of Visceral Surgery, Lausanne University Hospital (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland.
2 Department of Visceral Surgery, Lausanne University Hospital (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland; Division of Surgery, Riviera-Chablais Hospital (HRC), Rennaz, Switzerland.
3 Department of Visceral Surgery, Lausanne University Hospital (CHUV), rue du Bugnon 46, 1011 Lausanne, Switzerland; Faculty of Biology and Medicine, University of Lausanne (UNIL), Lausanne, Switzerland. Electronic address: styliani.mantziari@chuv.ch.