1. Department of Pediatrics, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
2. Spaarne Gasthuis Academy, Spaarne Gasthuis, Hoofddorp, The Netherlands
3. Department of Pediatrics, Franciscus Gasthuis & Vlietland, Rotterdam, The Netherlands
4. Department of Pediatric Pulmonology and Allergology, Sophia Children’s Hospital, Erasmus University Medical Center, Rotterdam, The Netherlands
5. Department of Medical Microbiology and Infectious Diseases, Erasmus University Medical Center, Rotterdam, The Netherlands
6. National Institute for Public Health and the Environment, Centre for Infectious Disease Control, Bilthoven, The Netherlands
7. The Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom