1. Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Baronissi, Salerno, Italy
2. Pain Unit, Department of Neuroscience, Santa Maria delle Croci Hospital, AUSL Romagna, 48121 Ravenna, Italy
3. Pediatric Anesthesia and Intensive Care Unit, Salesi Children’s Hospital, 60123 Ancona, Italy