[1] Univ Hosp Bonn, Dept Palliat Med, D-53105 Bonn, Germany
[2] Univ Lancaster, Div Hlth Res, Int Observ End Life Care, Lancaster, England
[3] RWTH Aachen Univ Hosp, Dept Palliat Med, Aachen, Germany
[4] Malteser Hosp Bonn Rhein Sieg, Ctr Palliat Med, Bonn, Germany