[1] Heinrich Heine Univ Duesseldorf, Med Fac, Dept Anesthesiol, Dusseldorf, Germany
[2] Heinrich Heine Univ Duesseldorf, Univ Hosp Duesseldorf, Dusseldorf, Germany
[3] Heinrich Heine Univ Duesseldorf, Univ Hosp Duesseldorf, Med Fac, Interdisciplinary Ctr Palliat Med, Moorenstr 5, D-40225 Dusseldorf, Germany
[4] Heinrich Heine Univ Duesseldorf, Univ Hosp Duesseldorf, Ctr Integrated Oncol Aachen Bonn Cologne Duesseldo, Moorenstr 5, D-40225 Dusseldorf, Germany
[5] Univ Med Ctr Hamburg Eppendorf, Dept Oncol Hematol & Bone Marrow Transplant, Palliat Care Unit, Hamburg, Germany
[6] Ludwig Maximilians Univ Munchen, LMU Univ Hosp, Dept Palliat Med, Munich, Germany
[7] Univ Duisburg Essen, Univ Hosp Essen, Dept Palliat Med, Essen, Germany
[8] Univ Cologne, Dept Palliat Med, Cologne, Germany
[9] Univ Cologne, Fac Med, Ctr Integrated Oncol Aachen Bonn Cologne Duesseldo, Cologne, Germany
[10] Univ Cologne, Univ Hosp, Cologne, Germany
[11] Univ Hosp Wuerzburg, Interdisciplinary Ctr Palliat Med, Wurzburg, Germany
[12] RHON Klinikum AG, Campus Bad Neustadt, Bad Neustadt an der Saale, Germany
[13] Heinrich Heine Univ Duesseldorf, Med Fac, Dept Cardiol Pulmonol & Vasc Med, Dusseldorf, Germany
[14] Heinrich Heine Univ Duesseldorf, Med Fac, Dept Cardiac Surg, Dusseldorf, Germany
[15] Palliat Care Ctr Basel, Basel, Switzerland
[16] Univ Basel, Dept Clin Res, Basel, Switzerland