Michael S. Rafii, MD, PhD, isDirector, Memory Disorders Clinic; Assistant Professor of Neurosciences; Associate Medical Director, Alzheimer's Disease Cooperative Study; and Attending Neurologist, Shiley-Marcos Alzheimer's Disease Research Center at TheUniversity of California, San Diego.Thomas I. Cochrane, MD, MBA, isAssistant Professor of Neurology at Harvard Medical School's Brigham and Women's Hospital/Brigham and Women's Center for Bioethics. Dr. Cochrane is a staff neurologist, neuromuscular specialist, and medical ethicist. He is active in teaching and supervising medical students, residents, and neuromuscular fellows. His research and academic work involves topics in medical ethics and neurology.Tao Le, MDis series editor. He is Assistant Professor of Pediatrics, University of Louisville.