[1] Univ Catania, Dept Biomed & Biotechnol Sci, Catania, Italy
[2] Fdn Ist G Giglio, Dept Anesthesiol & Pain, Cefalu, Italy
[3] Osped Iseo, Dept Anesthesiol & Pain Med, ASST Franciacorta, Iseo, Italy
[4] Monaldi Hosp, Dept Pain Management, AO Osped Colli, Naples, Italy
[5] Asst Grande Osped Metropolitano Niguarda, Dept Anesthesia Crit Care & Pain Med, Milan, Italy
[6] Lodi Hosp, Dept Anesthesia Postoperat Intens Care & Pain Ther, Lodi, Italy
[7] St Magdolna Hosp, Dept Anesthesiol, Budapest, Hungary
[8] Private Hosp Maddalena, Dept Pain Relief & Support Care, Palermo, Sicilia, Italy
[9] Univ Palermo, Dept Anesthesiol & Intens Care, Palermo, Italy
[10] NYU, Dept Anesthesiol Perioperat Care & Pain Med, Sch Med, New York, NY USA
[11] NYU, Dept Populat Hlth, Div Med Eth, Sch Med, New York, NY USA
[12] Osped Iseo, Dept Anesthesiol & Pain Med, ASST Franciacorta, Via Giardini Garibaldi 4, I-25049 Iseo, Italy