1. 1 Ghana Institute of Clinical Genetics, Korle-Bu, Accra, Ghana
2. 2 Department of Haematology, Korle-Bu Teaching Hospital, Accra, Ghana
3. 3 Vanderbilt-Meharry-Matthew Walker Center of Excellence in Sickle Cell Disease, Nashville, TN
4. 4 Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN
5. 5 Department of Haematology, University of Ghana Medical School, Accra, Ghana
6. 6 Department of Obstetrics and Gynaecology, University of Ghana Medical School, Accra, Ghana
7. 7 Department of Obstetrics and Gynaecology, Korle-Bu Teaching Hospital, Accra, Ghana