1 Unit of Anesthesia, Resuscitation, Intensive Care and Pain Management, ASST Gaetano Pini, Milan, Italy.
2 Unit of Anesthesia, Resuscitation, Intensive Care and Pain Management, Humanitas Mater Domini Hospital, Castellanza, Varese, Italy.
3 Unit of Anesthesia, Intensive Care and Pain Management, Department of Medicine, Campus Bio-Medico University, Rome, Italy - g.pascarella@unicampus.it.
4 Unit of Anesthesia, Intensive Care and Pain Management, Department of Medicine, Campus Bio-Medico University, Rome, Italy.
5 Department of Anesthesia and Postoperative Intensive Care, Rizzoli Orthopedic Institute, Bologna, Italy.
6 Unit of Diagnostic Imaging, Cittadella della Salute di Lecce, Lecce, Italy.
7 Department of Anesthesia and Chronic Pain, Móstoles Hospital, Madrid, Spain.