[1] Ist Nazl Tumori IRCCS Fdn Pascale, Pain Unit & Res, I-80100 Naples, Italy
[2] Infermi Hosp, Dept Anesthesia & Intens Care, AUSL Romagna, I-47923 Rimini, Italy
[3] Univ Parma, Dept Med & Surg, Anesthesiol Crit Care & Pain Med Div, I-43126 Parma, Italy
[4] Osped Pediatr Bambino Gesu, Dept Anesthesia & Crit Care, ARCO ROMA, IRCCS, I-00165 Rome, Italy
[5] CaFoscari Univ, Dept Econ, I-30121 Venice, Italy
[6] CaFoscari Univ, Dept Management, I-30121 Venice, Italy