1 Department of Internal Medicine, Allergology, Erasmus MC, Rotterdam, the Netherlands. Electronic address: j.p.m.vandervalk@erasmusmc.nl.
2 Department of Internal Medicine, Allergology, Erasmus MC, Rotterdam, the Netherlands.
3 Food Allergy Research & Resource Program, University of Nebraska, Lincoln, Nebraska.
4 Department of Paediatrics, Onze Lieve Vrouwe Gasthuis, Amsterdam, the Netherlands.
5 Department of Pediatric Allergology, Diaconessenhuis Voorburg, RdGG, Delft, the Netherlands.
6 Department of Pediatric Pulmonology and Pediatric Allergology, University Medical Centre Groningen, GRIAC Research Institute, University of Groningen, Groningen, the Netherlands.