1. Pain Unit and Research, Istituto Nazionale Tumori IRCCS Fondazione Pascale, 80100 Napoli, Italy
2. Department of Anesthesia and Intensive Care, Infermi Hospital, AUSL Romagna, 47923 Rimini, Italy
3. Anesthesiology, Critical Care and Pain Medicine Division, Department of Medicine and Surgery, University of Parma, 43126 Parma, Italy
4. Department of Anesthesia and Critical Care, ARCO ROMA, Ospedale Pediatrico Bambino Gesù, IRCCS, 00165 Rome, Italy
5. Department of Economics, Ca’ Foscari University, 30121 Venice, Italy
6. Department of Management, Ca’ Foscari University, 30121 Venice, Italy