[1] Ludwig Maximilians Univ Munchen, LMU Univ Hosp, Dept Palliat Med, Munich, Germany
[2] Georg August Univ Goettingen, Univ Med Ctr, Dept Palliat Med, Gottingen, Germany
[3] Univ Wollongong, Australian Hlth Serv Res Inst, Palliat Care Outcomes Collaborat, Wollongong, NSW, Australia
[4] Zurich Univ Appl Sci, Inst Nursing, Sch Hlth Sci, Winterthur, Switzerland
[5] Univ Hull, Wolfson Palliat Care Res Ctr, Hull York Med Sch, Kingston Upon Hull, England