Thomas P Leist, MD, PhD, is Professor of Neurology, Chief of the Division of Clinical Neuroimmunology, and Director of the Comprehensive Multiple Sclerosis Center at Jefferson University in Philadelphia, PA. He also directs the Jefferson Medical College fellowship program in clinical neuroimmunology. He earned a PhD from the University of Zurich in Switzerland and received his medical degree from the University of Miami School of Medicine. Dr Leist completed his residency at Cornell Medical Center and Memorial Sloan-Kettering Medical Center in New York, and he trained as a fellow at the National Institutes of Health in Bethesda, MD. He conducts translational, immunological, imaging, and outcomes research in multiple sclerosis and other autoimmune and infectious conditions of the CNS. Dr Leist is involved in clinical trials at all stages of development. In addition, he serves on the editorial advisory board for Practical Neurology and is a reviewer for several journals including Multiple Sclerosis, Annals of Neurology, and Journal of Neuroimmunology.