1 Erasmus MC, Erasmus University Medical Centre Rotterdam, Department of Public Health, Rotterdam, The Netherlands.
2 Amsterdam University Medical Centres, University of Amsterdam, Emma Children's Hospital, Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam Reproduction and Development, Amsterdam Public Health, Amsterdam, The Netherlands.
3 Centre for Benign Haematology, Thrombosis and Haemostasis, Van Creveldkliniek, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands.
4 Amsterdam UMC location University of Amsterdam, Emma Children's Hospital, Paediatric Haematology, Amsterdam, The Netherlands.
5 Erasmus MC Sophia Children's Hospital, Erasmus University Medical Centre Rotterdam, Department of Paediatric Haematology, The Netherlands.