* Authors denote equal contribution.
1 The Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.2 Department of General Pediatrics, Erasmus MC, University Medical Center Rotterdam- Sophia Children’s Hospital, Rotterdam, the Netherlands.3 Department of Dermatology, Erasmus MC, University Medical Center Rotterdam-Sophia Children’s Hospital-Center of Pediatric Dermatology, Rotterdam, the Netherlands.4 Department Immunology and Pathology, Central Clinical School, Monash University and The Alfred Hospital, Melbourne, VIC, Australia.5 Department of Pediatrics, Division of Respiratory Medicine and Allergology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.6 Department of Pediatrics, Division of Neonatology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.7 Department of Public Health and Primary Care, Leiden University Medical Center/LUMC Campus, The Hague, The Netherlands.