1. Department of Child Health and Pediatrics; Moi Teaching and Referral Hospital; Eldoret Kenya
2. Department of Pediatric Oncology-Hematology and Doctor 2 Doctor program; VU University Medical Center; Amsterdam the Netherlands
3. Department of Pediatrics; Division of Hemato-Oncology; Indiana University School of Medicine; Indianapolis
4. Department of Pediatrics; Dr Sardjito Hospital; Yogyakarta Indonesia
5. Department of Epidemiology and Biostatistics; VU University Medical Center; Amsterdam the Netherlands