1. Hellenic Society for Social Pediatrics and Health Promotion Athens Greece
2. Department of Pediatric Hematology‐Oncology P&Α Kyriakou Children's Hospital Αthens Greece
3. Division of Infectious Diseases, First Department of Pediatrics, “Aghia Sophia” Children's Hospital, Medical School National and Kapodistrian University of Athens Athens Greece
4. Children's & Adolescents’ Radiotherapy Department P&A Kyriakou Children's Hospital Athens Greece
5. Children and Adolescents’ Hematology‐Oncology Department ‘Mitera’ Children's Hospital Athens Greece
6. Department of Pediatrics, Medical School University of Patras Rio Achaia Greece
7. Department of Pediatrics, University General Hospital Medical School University of Thessaly Larissa Greece
8. Hematology‐Oncology Unit, 2nd Pediatric Department Aristotle University of Thessaloniki, AHEPA Hospital Thessaloniki
9. Department of Pediatric Oncology Hippokration General Hospital Thessaloniki Greece
10. Pediatric Hematology‐Thalassemia Unit, Department of Pediatrics, Faculty of Medicine, School of Health Sciences University of Ioannina Ioannina Greece
11. Department of Imaging, A Sofia Children's Hospital National and Kapodistrian University of Athens Athens Greece
12. Hematology‐Oncology Unit, Department of Pediatrics University General Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, Thrace, Greece
13. Department of Hygiene and Epidemiology, School of Medicine University of Ioannina Ioannina Greece
14. Department of Neurosurgery A. Sofia Children's Hospital Athens Greece
15. Pediatric Hematology‐Oncology Unit, First Department of Pediatrics, A. Sofia Children's Hospital, Medical School National and Kapodistrian University of Athens Athens Greece
16. 4th Department of Pediatrics Aristotle University of Thessaloniki Greece
17. Department of Pathology “Hygeia” General Hospital of Athens Athens Greece
18. Dept of Pediatric Hematology‐Oncology A. Sofia Children's Hospital Athens Greece
19. Secretary General, Primary Health Care Ministry of Health Athens Greece
20. Center for Evidence Synthesis in Health, Department of Health Services, Policy and Practice, School of Public Health Brown University Providence Rhode Island USA
21. Department of Epidemiology, Hygiene and Medical Statistics National and Kapodistrian University of Athens Athens Greece