1 From the Department of Neurology (D.S.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Internal Medicine (D.S.), University of Zambia School of Medicine, Lusaka; and Department of Neurology (N.V.), Stanford University, CA. deanna@jhmi.edu.
2 From the Department of Neurology (D.S.), Johns Hopkins University School of Medicine, Baltimore, MD; Department of Internal Medicine (D.S.), University of Zambia School of Medicine, Lusaka; and Department of Neurology (N.V.), Stanford University, CA.