Institution: US Food and Drug Administration, Center for Drug Evaluation and Research, Office of Surveillance and Epidemiology, Silver Spring, MD 20993, USA

Research Interests: Awareness, Laboratory, Leukoencephalopathy, Multiple Sclerosis, Patients, Progressive Multifocal Leukoencephalopathy, Risk, Sclerosis, Central Nervous System, Herpesvirus Infections, Infections, Nervous System, Opportunistic Infections, Association, Biopsy, Brain, Disease, Immune Reconstitution Inflammatory Syndrome, Iris, Jc Virus