[1] Univ Childrens Hosp, Dept Paediat, Regensburg, Germany
[2] Univ Basel Childrens Hosp UKBB, Dept Infect Dis & Vaccinol, Basel, Switzerland
[3] Univ Melbourne, Dept Paediat, Parkville, Vic, Australia
[4] Lucerne Cantonal Hosp, Childrens Hosp, Dept Paediat & Paediat Infect Dis, Luzern, Switzerland
[5] Univ Fribourg, Fac Sci & Med, Dept Community Hlth, Fribourg, Switzerland
[6] Fribourg Hosp, Dept Paediat, Fribourg, Switzerland
[7] Murdoch Childrens Res Inst, Infect Dis Res Grp, Parkville, Vic, Australia
[8] Univ Childrens Hosp Regensburg, Dept Paediat, Steinmetzstr 1-3, D-93049 Regensburg, Germany