1 Department of Medical, Surgical, Neurologic, Metabolic and Aging Sciences, XI Division of General and Obesity Surgery, University of Campania Luigi Vanvitelli, Naples, Italy. Electronic address: paolo.limongelli@unicampania.it.
2 Department of Perioperative Medicine, Pain, ICU and RRS, Chieti University Hospital, ASL 2 Abruzzo, Chieti Pescara, Italy.
3 Department of Medical, Surgical, Neurologic, Metabolic and Aging Sciences, XI Division of General and Obesity Surgery, University of Campania Luigi Vanvitelli, Naples, Italy.