[1] Univ Bern, Inst Social & Prevent Med ISPM, Mittelstr 43, CH-3012 Bern, Switzerland
[2] Univ Bern, Grad Sch Hlth Sci, Bern, Switzerland
[3] Univ Bern, Univ Hosp Bern, Inselspital, Univ Ctr Palliat Care, Bern, Switzerland
[4] Univ Bern, Univ Lib Bern, Publ Hlth & Primary Care Lib, Bern, Switzerland