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Lawrence P. Levitt, MD, is Senior Consultant in Neurology Emeritus at Lehigh Valley Hospital in Allentown, Pennsylvania. He founded the neurology division at that hospital and assisted the effort to transform it into the largest teaching hospital in Pennsylvania. He is Professor of Clinical Medicine (Neurology) at Penn State College of Medicine. He is co-author of Neurology, one of America’s most popular neurology texts. The book is now in its eighth edition, and has been translated into eight foreign languages including Russian, Chinese, and Japanese.

John E. Castaldo, MD, is the Chief of the Division of Neurology at Lehigh Valley Hospital (LVH), led neuroscience research for twenty years, and heads the national recognized LVH Stroke Center. He is Professor of Clinical Medicine (Neurology) at Penn State College of Medicine. He has published many articles in the field of cerebrovascular disease and won the Cardiovascular/Neurovascular Care Award from the American Heart Association for his clinical work in the field.

Drs. Levitt and Castaldo both live in Allentown, Pennsylvania.

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