1. Department of Psychiatry and Biobehavioral Sciences and Semel Institute, The David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
2. Laboratory of Neuroimaging, Department of Neurology, Division of Brain Mapping, UCLA, Los Angeles, CA, USA
3. Greater Los Angeles VA Healthcare System, West Los Angeles, CA, USA
4. Department of Neurology, The David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
5. Department of Radiology, The David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
6. Siemens Medical Solutions, Los Angeles, CA, USA
7. University of Texas Health Science Center at San Antonio, Department of Epidemiology and Biostatistics, San Antonio, TX, USA
8. Department of Neurosurgery, Penn State Hershey Medical Center, Hershey, PA, USA