From the Taub Institute for Research of Alzheimer’s Disease and the Aging Brain (Drs. Luchsinger, Tang, and Mayeux), the Divisions of Biostatistics (Dr. Tang) and Epidemiology (Drs. Shea and Mayeux), Joseph P. Mailman School of Public Health, and the Gertrude H. Sergievsky Center (Dr. Mayeux), Columbia University, New York; Division of General Medicine, Department of Medicine (Drs. Luchsinger and Shea), and Departments of Neurology and Psychiatry (Dr. Mayeux), Columbia University College of... (At 2004-06-08)