1. School of Nursing and Health; University of Groningen; University Medical Center Groningen; The Netherlands
2. Department of Pediatric Oncology and Hematology Beatrix Children's Hospital; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
3. Department of Pediatrics Beatrix Children's Hospital; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
4. Department of Health Sciences; Health Psychology Section; University of Groningen; University Medical Center Groningen; Groningen The Netherlands