[1] Vastmanland Cty Hosp, Dept Internal Med, Vasteras, Sweden
[2] Ryhov Cty Hosp, Dept Paediat, Jonkoping, Sweden
[3] Jonkoping Univ, Futurum, Jonkoping, Sweden
[4] Univ Gothenburg, Sahlgrenska Acad, Inst Clin Sci, Gothenburg, Sweden
[5] Sahlgrens Univ Hosp, Queen Silvia Childrens Hosp, Gothenburg, Sweden
[6] Univ Hosp Orebro, Dept Paediat, Orebro, Sweden
[7] Orebro Univ, Sch Med, Orebro, Sweden