1. Department of Pediatric Psychology, VU University Medical Center, Amsterdam, the Netherlands.
2. University of Amsterdam and Research Priority Area Yield, Amsterdam, the Netherlands.
3. Department of Pediatric Psychology, Emma Children's Hospital Academic Medical Center, Amsterdam, the Netherlands.
4. Department of Pediatric Pulmonology, VU University Medical Center, Amsterdam, the Netherlands.
5. Department of Psychology, Utrecht University, Utrecht, the Netherlands.