1. Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
2. Department of Pharmacology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
3. Cognitive Neuroscience Division of the Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Medical Center, New York, NY, USA
4. Memory and Aging Center and Department of Neurology, University of California, San Francisco, CA, USA