1. Department of Surgery, Obesity Unit, Tor Vergata University Hospital, Viale Oxford 81–00133, Rome, Italy
2. Department of Systems Medicine, Tor Vergata University Hospital, Viale Oxford 81–00133, Rome, Italy
3. Department of Surgery, Tor Vergata University Hospital, Viale Oxford 81–00133, Rome, Italy
4. Department of General Surgery, “Vito Fazzi” Hospital, Piazza Muratore 1–73100, Lecce, Italy