1. Department of Pediatric OncologyAmsterdam UMC, Emma Children's Hospital, Cancer Center AmsterdamVrije Universiteit Amsterdam Amsterdam The Netherlands
2. Princess Máxima Center for Pediatric Oncology Utrecht The Netherlands
3. Psychosocial DepartmentAmsterdam UMC, Emma Children's HospitalUniversity of Amsterdam Amsterdam The Netherlands
4. Department of Pediatric OncologyAmsterdam UMC, Emma Children's HospitalUniversity of Amsterdam Amsterdam The Netherlands
5. Department of Ophthalmology, Amsterdam UMCVrije Universiteit Amsterdam Amsterdam The Netherlands