[1] Cantonal Hosp Lucerne, Lucerne Childrens Hosp, Paediat Infect Dis, Spitalstr, CH-6000 Luzern 16, Switzerland
[2] Univ Childrens Hosp Zurich, Div Infect Dis & Hosp Epidemiol, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[3] Childrens Hosp Eastern Switzerland, Infect Dis & Hosp Epidemiol, Claudiusstr 6, CH-9006 St Gallen, Switzerland
[4] Univ Basel, Childrens Hosp, Paediat Infect Dis, Spitalstr 33, CH-4056 Basel, Switzerland
[5] Univ Bern, Bern Univ Hosp, Inselspital, Dept Pediat Infect Dis, Freiburgstr 15, CH-3010 Bern, Switzerland
[6] Lausanne Univ Hosp, Dept Mother Woman Child, Pediat Infect Dis & Vaccinol Unit, Lausanne, Switzerland
[7] Osped Reg Bellinzona & Valli, Pediat Inst Southern Switzerland, Pediat Infect Dis, Via Osped 12, CH-6500 Bellinzona, Switzerland
[8] Univ Hosp Geneva, Dept Woman Child & Adolescent, Gen Pediat & Pediat Infect Dis Unit, CH-1211 Geneva 14, Switzerland
[9] Med Sch Geneva, 6 Rue Willy Donze, CH-1211 Geneva 14, Switzerland
[10] Univ Fribourg, Fribourg Hosp HFR, Dept Paediat, Fribourg, Switzerland
[11] Univ Fribourg, Fac Sci & Med, Fribourg, Switzerland
[12] Cantonal Hosp Winterthur, Dept Paediat, Paediat Infect Dis, Brauerstr 15, CH-8401 Winterthur, Switzerland
[13] Univ Childrens Hosp Zurich, Paediat Urol, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[14] Cantonal Hosp Lucerne, Lucerne Childrens Hosp, Paediat Surg, Spitalstr, CH-6000 Luzern 16, Switzerland
[15] Univ Childrens Hosp Basel, Pediat Nephrol, Spitalstr 33, CH-4031 Basel, Switzerland
[16] Univ Childrens Hosp Zurich, Pediat Nephrol, Steinwiesstr 75, CH-8032 Zurich, Switzerland
[17] Wildermeth Childrens Hosp, Pediat Clin, Kloosweg 84, CH-2502 Biel, Switzerland
[18] Cantonal Hosp Lucerne, Lucerne Childrens Hosp, Paediat, Spitalstr, CH-6000 Luzern 16, Switzerland