[1] Clin Res Ctr, SE-79182 Falun, Sweden
[2] Karolinska Inst, Dept Publ Hlth Sci, Div Int Hlth IHCAR, Stockholm, Sweden
[3] Lund Univ, Dept Clin Sci, Infect Dis Res Unit, Malmo, Sweden
[4] Nord Sch Publ Hlth, Gothenburg, Sweden
[5] Apoteket AB, Gothenburg, Sweden
[6] Lovisenberg Deaconal Univ Coll, Oslo, Norway
[7] Karolinska Hosp, Dept Pediat, S-10401 Stockholm, Sweden
[8] Cent Hosp Vaxjo, Dept Infect Dis Control, Vaxjo, Sweden
[9] Uppsala Univ, Dept Publ Hlth & Caring Sci Family Med, Uppsala, Sweden
[10] Unit R&D Primary Hlth Care, Jonkoping, Sweden
[11] Linkoping Univ, Dept Med & Hlth Sci, S-58183 Linkoping, Sweden