1. Gertrude H. Sergievsky Center, Columbia University, New York, NY, USA. Taub Institute for Research of Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA. Division of General Medicine, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA. Department of Epidemiology, Joseph P. Mailman School of Public Health, Columbia University, New York, NY, USA