[1] Fdn IRCCS Policlin San Matteo, Pain Therapy Serv, Pavia, Italy
[2] Azienda Osped Univ Parma, SIMPAR Study Multidisciplinary Pain Res Grp, UO Anestesia Rianimaz & Terapia Antalg 2a, Parma, Italy
[3] Azienda Osped Univ Parma, YAP Young Pain Grp, UO Anestesia Rianimaz & Terapia Antalg 2a, Parma, Italy
[4] McGill Univ, Alan Edwards Pain Ctr Res Pain, Montreal, PQ, Canada
[5] Montreal Childrens Hosp, Dept Anesthesia, Montreal, PQ H3H 1P3, Canada
[6] Stanford Univ, Sch Med, Dept Neurol & Neurol Sci, Palo Alto, CA 94304 USA
[7] Norwegian Univ Sci & Technol NTNU, Dept Circulat & Med Imaging, Trondheim, Norway
[8] St Olavs Univ Hosp, Dept Anesthesiol & Intens Care Med, Trondheim, Norway
[9] Univ Pittsburgh, Dept Anesthesiol, Pittsburgh, PA USA
[10] Univ Parma, Dept Biol & Biotechnol, I-43126 Parma, Italy
[11] Univ Parma, Dept Expt & Appl Pharmacol, I-43126 Parma, Italy
[12] Univ Parma, Dept Clin Surg Pediat & Diagnost Sci, I-43126 Parma, Italy
[13] Azienda Osped San Gerardo, Serv Anesthesia 1, Monza, Italy
[14] Fdn IRCCS Policlin San Matteo, Lab Biochem & Genet, Div Pneumol, Dept Mol Med, Pavia, Italy
[15] Fdn IRCCS Policlin San Matteo, Clin & Expt Pharmacokinet Unit, Pavia, Italy
[16] Univ Parma, Dept Surg Sci, Anesthesia Crit Care & Pain Med, I-43126 Parma, Italy
[17] Azienda Osped Univ Parma, UO Anestesia Rianimaz & Terapia Antalg 2a, Parma, Italy