[1] Univ Freiburg, Dept Palliat Med, Fac Med, Med Ctr, Robert Koch Str 3, D-79106 Freiburg, Germany
[2] Univ Med Ctr Ulm, Comprehens Canc Ctr, Dept Hematol & Oncol, Albert Einstein Allee 23, D-89081 Ulm, Germany
[3] Heidelberg Univ, Mannheim Univ Hosp, Mannheim Canc Ctr, Mannheim Fac Med,Dept Hematol & Oncol, Theodor Kutzer Ufer 1-3, D-68167 Mannheim, Germany
[4] Univ Hosp Heidelberg, Dept Anaesthesiol, Devis Pain Med, Neuenheimer Feld 131, D-69120 Heidelberg, Germany
[5] Competence Ctr Palliat Care Baden Wuerttemberg, Robert Koch Str 3, D-79106 Freiburg, Baden Wuerttemb, Germany
[6] Univ Hosp Heidelberg, Dept Palliat Med, Neuenheimer Feld 305, D-69120 Heidelberg, Germany