1 From the Department of Internal Medicine (S.Z.), University Teaching Hospital, Lusaka, Zambia; Department of Internal Medicine (S.Z.), University of Zambia School of Medicine, Lusaka; University College London (L.B.); and National Hospital for Neurology and Neurosurgery (L.B.), University College London Foundation Trust, United Kingdom. stanpaulzimba@yahoo.co.uk.
2 From the Department of Internal Medicine (S.Z.), University Teaching Hospital, Lusaka, Zambia; Department of Internal Medicine (S.Z.), University of Zambia School of Medicine, Lusaka; University College London (L.B.); and National Hospital for Neurology and Neurosurgery (L.B.), University College London Foundation Trust, United Kingdom.