[1] Univ Hosp Geneva, Dept Community Med, Geneva, Switzerland
[2] Inst Social & Prevent Med, Lausanne, Switzerland
[3] Univ Lausanne Hosp, Med Outpatient Clin, Lausanne, Switzerland
[4] Swisspep, Inst Hlth Qual & Res, Bern, Switzerland
[5] Lungenliga Schweiz, Bern, Switzerland