1. Department of Surgery; University of Ferrara; Ferrara Italy
2. Department of Emergency and Organ Transplantation; University of Bari; Bari Italy
3. Abdominal Surgery; University Hospital Gasthuisberg; Leuven Belgium
4. Department of General and Digestive Surgery; Hospital Vall d'Hebron; Barcelona Spain
5. Department of Surgery; Aarhus University Hospital; Aarhus Denmark
6. General Surgery; Hopital Saint-Antoine; Paris France