[1] Univ Parma, Dept Surg Sci, Parma, Italy
[2] SIMPAR Grp Study Multidisciplinary Pain Res, Florence, Italy
[3] Univ Hosp Parma, Dept Anesthesiol Intens Care & Pain Therapy, Parma, Italy
[4] San Donato Polyclin & Inst Res & Care, Dept Reg Anesthesia & Pain Therapy, Milan, Italy
[5] S Croce & Carle Hosp, Dept Anesthesiol & Intens Care, Cuneo, Italy
[6] Legnano Civil Hosp, Dept Anesthesiol & Intens Care, Milan, Italy
[7] Padua Hosp, Dept Anesthesia & Reanimat, Padua, Italy
[8] Papa Giovanni XXII Hosp, Dept Anesthesiol & Intens Care, Bergamo, Italy
[9] Campus Biomed Univ, Dept Anesthesia & Intens Care, Rome, Italy
[10] Reggio Emilia Hosp, Arcispedale Santa Maria Nuova, Dept Anesthesiol & Intens Care, Reggio Emilia, Italy
[11] Univ Bologna, Rizzoli Orthoped Inst, Dept Biomed & Neuromotor Sci, Anesthesia & Intens Care Res Unit, Bologna, Italy