Affiliation: | Institute for Risk Assessment Sciences, University of Utrecht, Utrecht,;National Institute of Public Health and the Environment, Bilthoven;, Department of Paediatrics, Erasmus University Medical Center/Sophia Children's Hospital, Rotterdam, Departments of;Paediatric Respiratory Medicine,;Pulmonology, and;Epidemiology and Statistics, University of Groningen, Groningen,;Central Laboratory of the Red Cross Blood Transfusion Service, Amsterdam, the Netherlands |