1 GH Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
2 Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
3 Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
4 Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
5 Program in Physical Therapy, Department of Rehabilitation Regenerative Medicine, College of Physicians and Surgeons, Columbia University, New York, NY, USA