[1] Fdn IRCCS Ist Nazl Tumori, Palliat Care Pain Therapy & Rehabil Unit, I-20133 Milan, Italy
[2] Univ Bristol, Bristol Haematol & Oncol Ctr, Dept Palliat Med, Bristol, Avon, England
[3] Norwegian Univ Sci & Technol NTNU, Dept Canc Res & Mol Med, Fac Med, Trondheim, Norway
[4] Norwegian Univ Sci & Technol NTNU, European Palliat Care Res Ctr PRC, Dept Circulat & Med Imaging, Trondheim, Norway
[5] Norwegian Univ Sci & Technol NTNU, Dept Canc Res & Mol Med, Trondheim, Norway
[6] St Olavs Univ Hosp, Dept Oncol, Trondheim, Norway
[7] St Olavs Univ Hosp, Dept Anesthesiol & Emergency Med, Trondheim, Norway
[8] Univ Leeds, Leeds Inst Hlth Sci, Leeds, W Yorkshire, England
[9] Shaare Zedek Med Ctr, Dept Oncol, Jerusalem, Israel
[10] European Assoc Palliat Care, Milan, Italy
[11] Univ Edinburgh, St Columbias Hosp, Edinburgh, Midlothian, Scotland
[12] Kings Coll London, Analges & Pain Res Unit, London WC2R 2LS, England
[13] Haukeland Hosp, Reg Ctr Excellence Palliat Care, N-5021 Bergen, Norway
[14] Copenhagen Univ Hosp Herlev, Dept Anaesthesia, Palliat Care Unit, Herlev, Denmark
[15] Ist Sci Romagnolo Studio Cura Tumori, Dept Med Oncol, Meldola, Italy
[16] La Maddalena Canc Ctr, Pain Relief & Palliat Care Unit, Anaesthesia & Intens Care Unit, Palermo, Italy
[17] Univ Palermo, Dept Anaesthesia & Intens Care, Palermo, Italy
[18] Hosp Arnau Vilanova, Palliat Care Support Team, Lleida, Spain
[19] Univ Hosp Bonn, Dept Palliat Med, Bonn, Germany
[20] Copenhagen Univ Hosp, Rigshosp, Ctr Multidisciplinary Pain, Copenhagen, Denmark
[21] St Georges Univ London, London, England
[22] City Hosp, Dept Oncol, Support & Palliat Care Unit, Rimini, Italy
[23] St Clare Hosp, Patient Serv, Hastingwood, England