[1] Univ Hosp Essen, West German Canc Ctr, Dept Med Oncol, D-45122 Essen, Germany
[2] Heinrich Heine Univ, Duesseldorf Univ Hosp, Med Fac, Dept Palliat Med, Moorenstr, Dusseldorf, Germany
[3] Friedrich Alexander Univ Erlangen Nurnberg FAU, Univ Hosp Erlangen, Dept Palliat Med, Erlangen, Germany
[4] Univ Duisburg Essen, LVR Klinikum Essen, Dept Psychosomat Med & Psychotherapy, Essen, Germany
[5] Univ Duisburg Essen, Univ Hosp Essen, Hosp Care, Essen, Germany
[6] Univ Hosp Essen, DAGGIST Consortium, West German Canc Ctr, Essen, Germany