1. Pediatric Hematology and Oncology, Department of Pediatrics, Antwerp University Hospital, Antwerp, Belgium
2. Pediatric hematology and Oncology, Department of Pediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg Hospital, Cape Town, South Africa
3. Department of Pediatric Oncology, Uganda Cancer Institute, Kampala, Uganda
4. Department of Ophthalmology, School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
5. Department of Pediatric Oncology, Hospital Sant Joan de Deu, Barcelona, Spain
6. Department of Surgery, Ophtalmology Service, Institut Curie, Paris, France
7. Goldschleger Eye Institute, Sheba Medical Center, Tel Hashomer, Tel-Aviv University, Tel-Aviv, Israel
8. International Center for Eye Health London School of Hygiene and Tropical Medicine, London, UK
9. Department of Pediatrics, Queen Elizabeth Central Hospital, Kamuzu University of Health Sciences, Blantyre, Malawi
10. Department of Child Health, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
11. Pediatric Hematology and Oncology Center, University Mohammed V Rabat, Rabat, Morocco
12. Pediatric Oncology Unit, Hôpital Le Dantec, Dakar, Senegal
13. Department of Pediatric Oncology, National Cancer Institute, Egypt & Children Cancer Hospital of Egypt (CCHE-57357), Cairo University, Giza, Egypt
14. Department of Pathology, University of Cambridge, Cambridge, UK
15. Department of Pediatric Oncology, Cameroon Baptist Convention Hospitals in Mutengene, Mbingo and Banso, Mutengene, Cameroon;
16. Division of Pediatric Hematology-Oncology, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Witwatersrand, South Africa