1. Department of Child Health, University of Ghana Medical School, Accra, Ghana.
2. Department of Child Health, Korle Bu Teaching Hospital, Accra, Ghana.
3. Center for Cancer and Blood Disorders, Children's National Hospital, Washington, District of Columbia, USA.
4. Department of Women, Child and General and Specialized Surgery, University of Campania “Luigi Vanvitelli,” Naples, Italy.
5. Department of Hematology, Korle-Bu Teaching Hospital, Accra, Ghana.
6. Division of Hematology-Oncology, New England Sickle Cell Institute, Neag Comprehensive Cancer Center, University of Connecticut, Farmington, Connecticut, USA.
7. Department of Pediatrics, Connecticut Children's Medical Center, Hartford, Connecticut, USA.
8. Department of Women's and Child Health, Clinic of Pediatric Hematology Oncology, Azienda Ospedaliera-Università di Padova, Padova, Italy.
9. Department of Physiology, University of Ghana Medical School, University of Ghana, Accra, Ghana.
10. Department of Pediatric Hematology/Oncology, Rainbow Babies and Children's Hospital, Cleveland, Ohio, USA.
11. Division of Pediatric Hematology/Oncology, University of Michigan, Ann Arbor, Michigan, USA.
12. Department of Pediatrics, University of California San Francisco, San Francisco, California, USA.
13. Department of Pediatrics, Albert Einstein College of Medicine, Children's Hospital at Montefiore, Bronx, New York, USA.
14. Division of Biostatistics and Study Methodology, Children's National Hospital, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, USA.
15. Ghana Institute of Clinical Genetics, Korle Bu Teaching Hospital, Accra, Ghana.
16. Department of Pediatric Haematology, Evelina Children's Hospital, Guy's and St. Thomas NHS Trust, College of Nursing, London, United Kingdom.
17. College of Health Nursing, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA.
18. Pediatric Hematology Oncology and Blood and Marrow Transplantation, Cleveland Clinic Foundation, Cleveland, OH, USA.
19. Division of Hematology, Department of Pediatrics, Children's National Hospital, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, USA.