[1] Univ Bern, Inselspital, Bern Univ Hosp, Dept Pediat, Bern, Switzerland
[2] Univ Bern, Inselspital, Bern Univ Hosp, Div Pediat Rheumatol,Dept Pediat, Bern, Switzerland
[3] Univ Bern, Inselspital, Univ Hosp Bern, Univ Inst Diagnost & Intervent Neuroradiol, Bern, Switzerland
[4] Univ Bern, Inselspital, Bern Univ Hosp, Div Pediat Nephrol,Dept Pediat, Bern, Switzerland
[5] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
[6] Univ Bern, Inselspital, Bern Univ Hosp, Dept Neurol, Bern, Switzerland