[1] Inselspital Bern, Univ Hosp, Univ Ctr Palliat Care, DOLS, SWAN C 518,Freiburgstr, CH-3010 Bern, Switzerland
[2] Maastricht Univ, Sch CAPHRI, Care & Publ Hlth Res Inst, Dept Hlth Serv Res, Maastricht, Netherlands
[3] Maastricht Univ, Sch CAPHRI, Care & Publ Hlth Res Inst, Dept Family Med, Maastricht, Netherlands
[4] Univ Alabama Birmingham, Sch Nursing, Birmingham, AL USA
[5] Karl Franzens Univ Graz, Inst Nursing Sci, Graz, Austria