[1] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[2] Inst Primary & Community Care, Luzern, Switzerland
[3] Swiss Parapleg Res, Nottwil, Switzerland
[4] Univ Basel Hosp, Div Internal Med, Dept Psychosomat Med, Hebelstr 2, CH-4031 Basel, Switzerland
[5] Univ Basel Hosp, Qual Management, Basel, Switzerland