1. Immunogenetics Laboratory, Department of Pathology and Laboratory Medicine Children's Hospital of Philadelphia Philadelphia Pennsylvania USA
2. Department of Genetics and Biology, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
3. Department of Biochemistry Kampala International University in Tanzania (KIUT) Dar es Salaam Tanzania
4. Department of Biological Sciences, Faculty of Science University of Botswana Gaborone Botswana
5. Department of Biomedical Sciences, Faculty of Medicine University of Botswana Gaborone Botswana
6. Department of Neuroscience Brain Research Africa Initiative (BRAIN) Yaoundé Cameroon
7. Department of Neurology & Neuroscience Central Hospital Yaoundé Yaoundé Cameroon
8. Neuroscience Lab, Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon
9. Department of Pharmacotoxicology and Pharmacokinetics, Faculty of Medicine and Biomedical Sciences The University of Yaoundé I Yaoundé Cameroon
10. Department of Microbial, Cellular and Molecular Biology Addis Ababa University Addis Ababa Ethiopia
11. National Marrow Donor Program/Be The Match Minneapolis Minnesota USA
12. Center for International Blood and Marrow Transplant Research Minneapolis Minnesota USA
13. Department of Pathology and Laboratory Medicine, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA