1. Mary S. Easton Center for Alzheimer's Disease Research; Department of Neurology; David Geffen School of Medicine at UCLA; Los Angeles California
2. Department of Neurology; David Geffen School of Medicine at UCLA; Los Angeles California
3. Laboratory of Neuro Imaging; David Geffen School of Medicine at UCLA; Los Angeles California
4. National Institute of Neurology and Neurosurgery; Mexico City Mexico
5. Department of Neuroscience; University of Guadalajara; Mexico
6. Semel Institute for Psychiatry and Human Behavior; UCLA; Los Angeles California