1. Department of Child and Adolescent Psychiatry/Psychology; Erasmus Medical Center-Sophia Children's Hospital; Rotterdam The Netherlands
2. Department of Pediatrics; Division of Cardiology; Erasmus Medical Center-Sophia Children's hospital; Rotterdam The Netherlands
3. Department of Pediatric Cardiology; Leiden University Medical Center; Leiden The Netherlands
4. Department of Cardiology; Radboud University Nijmegen Medical Center; Nijmegen The Netherlands