1. Department of Pharmacology and Experimental Neuroscience, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska.
2. Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon.
3. Department of Neurology, Yaoundé Central Hospital, Yaoundé, Cameroon.
4. Yaoundé University Teaching Hospital, Department of Haematology, Yaoundé, Cameroon.
5. Brain Research Africa Initiative (BRAIN), Yaoundé, Cameroon.