1. Department of Digestive and Emergency Surgery, “S.Maria” Hospital Trust, Terni, Italy
2. Department of General and Emergency Surgery, “S.Maria della Misericordia” Hospital Trust, Perugia, Italy
3. Department of Hepatobiliary Surgery, “F.Miulli” Hospital, Acquaviva delle Fonti, Italy
4. Department of Hepatobiliary Surgery, Catholic University of the Sacred Heart, Rome, Italy
5. Catholic University of the Sacred Heart, Milan, Italy