[1] Radboud Univ Nijmegen, Med Ctr, Dept Anesthesiol Pain & Palliat Med, NL-6500 HB Nijmegen, Netherlands
[2] Univ Hosp Gasthuisberg, Dept Radiat Oncol & Palliat Med, B-3000 Louvain, Belgium
[3] Univ Sheffield, Dept Oncol, Sch Med & Biomed Sci, Acad Unit Support Care, Sheffield, S Yorkshire, England
[4] Univ Hosp Bonn, Dept Palliat Med, Bonn, Germany
[5] Malteser Hosp Bonn Rhein Sieg, Dept Palliat Med, Ctr Palliat Care, Bonn, Germany
[6] Univ Gottingen, Dept Palliat Med, D-37073 Gottingen, Germany
[7] Paris Sud, Reseau Sante, Paris, France