1 From the Department of Internal Medicine (S.Z., D.S.), University Teaching Hospital; Lusaka, Zambia; Department of Internal Medicine (L.C., M.C., D.S.), University of Zambia School of Medicine, Lusaka, Zambia; and Department of Neurology (D.S.), Johns Hopkins University School of Medicine, Baltimore, MD. stanpaulzimba@yahoo.co.uk.
2 From the Department of Internal Medicine (S.Z., D.S.), University Teaching Hospital; Lusaka, Zambia; Department of Internal Medicine (L.C., M.C., D.S.), University of Zambia School of Medicine, Lusaka, Zambia; and Department of Neurology (D.S.), Johns Hopkins University School of Medicine, Baltimore, MD.