1 Department of Dermatology and Allergology, University Medical Center Utrecht, Wilhelmina Children's Hospital, Utrecht University, Utrecht, The Netherlands.
2 Department of Dermatology and Allergology, National Expertise Center for Atopic Dermatitis, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.
3 Department of Pediatric Pulmonology, Wilhelmina Children's Hospital - University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands.