[1] Univ Bern, Inst Social & Prevent Med, CH-3012 Bern, BE, Switzerland
[2] Swiss Natl Sci Fdn, Strategy Support, Bern, BE, Switzerland
[3] UCL, Dept Sci Technol Engn & Publ Policy, London, England
[4] Swiss Natl Sci Fdn, Res Council, Bern, BE, Switzerland
[5] Univ Bristol, Bristol Med Sch, Populat Hlth Sci, Bristol, Avon, England