[1] Radboud Univ Nijmegen, Med Ctr, Dept Anesthesiol Pain & Palliat Med, POB 9101,Internal Code 549, NL-6500 HB Nijmegen, Netherlands
[2] Univ Lancaster, Div Hlth Res, Int Observ End Life Care, Lancaster, England
[3] Univ Klinikum Bonn, Klin Palliat Med, Bonn, Germany
[4] Univ Pecs, Sch Med, Dept Primary Hlth Care, Pecs, Hungary
[5] Univ Hosp Leuven, Dept Radiat Oncol & Palliat Care, Leuven, Belgium