[1] Karlstad Univ, Dept Publ Hlth Sci, Univ Sgatan 2, SE-65349 Karlstad, Sweden
[2] Univ Florida, Dept Hlth Serv Res Management & Policy, Gainesville, FL USA
[3] Univ Gothenburg, Dept Educ & Special Educ, Gothenburg, Sweden
[4] Malmo Univ Hosp, Dept Dermatol & Venereol, Malmo, Sweden
[5] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, London, England
[6] Hlth Data Res UK, London, England
[7] Lund Univ, Skane Univ Hosp, Dept Occupat & Environm Dermatol, Lund, Sweden
[8] Orebro Univ, Ctr Clin Res, Orebro, Sweden