[1] Univ Basel, Univ Childrens Hosp Basel UKBB, Basel, Switzerland
[2] Univ Melbourne, Ctr Epidemiol & Biostat, Melbourne Sch Populat & Global Hlth, Allergy & Lung Hlth Unit, Melbourne, Australia
[3] Swiss Trop & Publ Hlth Inst Basel, Allschwil, Switzerland