1. Department of NeurologyJohns Hopkins University School of Medicine BaltimoreMaryland USA
2. Section of Infections of the Nervous SystemNational Institute of Neurological Disorders and Stroke, National Institutes of Health BethesdaMaryland USA
3. Center for Nanotechnology in Drug Delivery, Division of Molecular PharmaceuticsUniversity of North Carolina Eshelman School of Pharmacy, University of North Carolina Chapel HillNorth Carolina USA