1 Unit of Anesthesiology and Pain Therapy, IRCCS Rizzoli Orthopedic Institute, Bologna, Italy - [email protected].
2 Unit of Anesthesiology and Pain Therapy, Department of Obstetrics, Gynecology and Pediatrics, Sant'Orsola-Malpighi University Hospital, Bologna, Italy.
3 Department of Anesthesiology, Móstoles University Hospital, Madrid, Spain.