1. 1Department of Haematology and Blood Transfusion, Muhimbili University of Health and Allied Sciences, Dar-es-Salaam, Tanzania;
2. 2Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands;
3. 3Sickle Cell Program, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania;
4. 4Department of Molecular Biology and Biotechnology, University of Dar es Salaam, Dar es Salaam, Tanzania;
5. 5Plant Protection Department, Swedish University of Agricultural Sciences, Alnarp, Sweden;
6. 6InqabaBiotec East Africa Limited, Dar es Salaam, Tanzania;
7. 7Department of Clinical Nursing, School of Nursing, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania;
8. 8Department of Science and Laboratory Technology, Dar es Salaam Institute of Technology, Dar es Salaam, Tanzania;
9. 9Mbeya College of Health and Allied Sciences, University of Dar es Salaam, Mbeya, Tanzania;
10. 10Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands;
11. 11Kilimanjaro Christian Medical University College, Moshi, Tanzania;
12. 12African Institute of Biomedical Science and Technology, Wilkins Hospital, Harare, Zimbabwe;
13. 13National Institute for Medical Research, Dar es Salaam, Tanzania;
14. 14Faculty of Pharmaceutical Sciences, Monash University, Melbourne, Australia;
15. 15Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts;
16. 16Dar es Salaam University College of Education, UDSM, Dar es Salaam, Tanzania