[1] Gavle Cent Hosp, Dept Pediat, S-80187 Gavle, Sweden
[2] No Alvsborgs Hosp, Dept Pediat, Trollhattan, Sweden
[3] Uddevalla Cent Hosp, Dept Pediat, Uddevalla, Sweden
[4] Gothenburg Univ, Sahlgrenska Acad, Inst Clin Sci, GPGRC, Gothenburg, Sweden
[5] Karolinska Inst, Atherosclerosis Res Unit, Computat Med Grp, Dept Med, Stockholm, Sweden