[1] Karolinska Inst, Dept Publ Hlth Sci, Div Int Hlth IHCAR, SE-17176 Stockholm, Sweden
[2] Apoteket AB, Stockholm, Sweden
[3] Unit Res & Dev Primary Care, Jonkoping, Sweden
[4] Fac Hlth Sci, Div Med & Care, Ctr Clin Res Dalarna & Primary Care, Linkoping, Sweden
[5] Mid Sweden Univ, Dept Hlth Sci, Ostersund, Sweden
[6] Ostersund Cty Hosp, Dept Paediat, Ostersund, Sweden
[7] Karolinska Hosp, Dept Pediat, S-10401 Stockholm, Sweden
[8] Fac Hlth Sci, Inst Med & Care, Dept Clin Pharmacol, Linkoping, Sweden
[9] MAS, Univ Hosp, Dept Infect Dis, Malmo, Sweden
[10] Cent Hosp Vaxjo, Dept Infect Dis Control, Vaxjo, Sweden
[11] Uppsala Univ, Dept Publ Hlth & Caring Sci Family Med, Uppsala, Sweden
[12] Natl Board Hlth & Welf, Stockholm, Sweden