1. Ghana Institute of Clinical Genetics; Korle-Bu Accra Ghana
2. Department of Hematology, College of Health Sciences; University of Ghana; Accra Ghana
3. Department of Obstetrics and Gynecology; Korle-Bu Teaching Hospital; Accra Ghana
4. Department of Physiology, School of Biomedical and Allied Health Sciences; University of Ghana; Accra Ghana
5. Department of Anesthesia; Korle-Bu Teaching Hospital; Accra Ghana
6. Vanderbilt-Meharry Center of Excellence in Sickle Cell Disease, Vanderbilt University Medical Center; Nashville Tennessee
7. Duke University; Durham North Carolina
8. Statistical Consultant; Chicago Illinois
9. Department of Obstetrics and Gynecology, School of Medicine and Dentistry; University of Ghana; Accra Ghana