[1] Univ Med Ctr Freiburg, Dept Palliat Care, Freiburg, Germany
[2] Univ Hosp Cologne, Dept Palliat Med, Cologne, Germany
[3] Palliat Care Ctr Excellence Baden Wurttemberg, Baden Wurttemberg, Germany
[4] Inst Qual & Efficiency Hlth Care IQWiG, Cologne, Germany
[5] Univ Bremen, Inst Publ Hlth & Nursing Res IPP, D-28359 Bremen, Germany
[6] Univ Bremen, Hlth Sci Bremen, D-28359 Bremen, Germany
[7] Ctr Integrated Oncol CIO Cologne Bonn, Cologne, Germany
[8] Univ Hosp Cologne, Clin Trials Unit BMBF 01KN1106, Cologne, Germany