1. Department of Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana (F.S.S., A.S., D.O.).
2. Weill Institute for Neurosciences, School of Medicine, University of California San-Francisco (B.O., O.J.A., R.T.).
3. Department of Epidemiology and Medical Statistics (O.A., O.J.A.), an College of Medicine, University of Ibadan.
4. Department of Medicine, Obafemi Awolowo University Teaching Hospital, Ile-Ife, Nigeria (M.K., S.O., O.A., B.F.).
5. College of Medicine (J.A., O.A., A.M.A., A.M.A., A.A.), an College of Medicine, University of Ibadan.
6. Department of Medicine, University of Ilorin Teaching Hospital, Nigeria (K.W., E.O.S., J.A.O., O.I.O., P.M.K., A.H.B.).
7. Department of Medicine, Ahmadu Bello University, Zaria, Nigeria (R.O., P.I., B.O., S.A.A., A.G.S., W.O.).
8. Department of Medicine, Aminu Kano Teaching Hospital, Kano, Nigeria (L.O., E.A., S.Y.I., H.A.D.).
9. Department of Radiology (G.O.), an College of Medicine, University of Ibadan.
10. Department of Medicine, University of Ghana Medical School, Accra (A.A., B.C.-T., J.A., R.Y.L.).
11. Department of Medicine (A.F., E.O.U., M.M.T.-I., M.O.,S.D., M.O.), an College of Medicine, University of Ibadan.
12. Federal Teaching Hospital, Ido-Ekiti, Ado-Ekiti, Nigeria (T.S., E.O.).
13. Medical University of South Carolina, Charleston (G.M., C.J., D.T.L.).
14. Jos University Teaching Hospital Jos, Nigeria (S.A., G.A., G.O.O., L.I.).
15. Ladoke Akintola University of Technology/Teaching Hospital, Ogbomosho, Nigeria (A.A.A.).
16. Federal Medical Centre Umuahia, Nigeria (K.U., I.I.C., U.O., O.O., K.A.O.)
17. Federal Medical Centre, Abeokuta, Nigeria (O.A.O., C.A., O.A., O.O.A., T.O., K.S.A., W.A., J.A., R.A.).
18. Preventive Cardiology Research Unit, Institute of Cardiovascular Diseases (O.A., O.J.A.), an College of Medicine, University of Ibadan.
19. University College Hospital, Ibadan, Nigeria Aga Khan University Dar es Salaam, Tanzania (P.A.).
20. Federal Medical Centre, Keffi Zaria, Nigeria (V.S.).
21. Korle Bu Teaching Hospital, Accra, Ghana (Y.M.).
22. Komfo Anokye Teaching Hospital Kumasi, Ghana (L.A., S.A., V.O., N.A., M.A.).
23. Federal Medical Centre, Owo, Ondo State, Nigeria (A.A.E.).
24. University of Alabama at Birmingham, Alabama (H.K.T.).
25. College of Public Health, University of Kentucky (D.A., J.I.).
26. Delta State University/Delta State University Teaching Hospital, Oghara, Nigeria (O.Y.O.).
27. Department of Pharmacology and Therapeutics, Olabisi Onabanjo University. Abeokuta, Nigeria (L.O.).
28. Greater Accra Regional Hospital, Accra, Ghana (F.A.).
29. Federal Medical Centre, Lokoja, Kogi state, Nigeria (H.I.).