1. Department of Psychiatry, University of California San Diego, La Jolla, California, USA
2. Center for Behavior Genetics of Aging, University of California San Diego, La Jolla, California, USA
3. Department of Radiology, University of California San Diego, La Jolla, California, USA
4. Imaging Genetics Center, USC Mark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA
5. Department of Population and Public Health Sciences, University of Southern California, Los Angeles, USA
6. Department of Neurology, University of Southern California, Los Angeles, California, USA
7. Leonard Davis School of Gerontology, University of Southern California, Los Angeles, California, USA
8. Department of Environmental & Occupational Health Sciences, University of Washington, Seattle, Washington, USA
9. Department of Medicine, University of Washington, Seattle, Washington, USA
10. Department of Epidemiology, University of Washington, Seattle, Washington, USA
11. Institute for Behavioral Genetics, University of Colorado, Boulder, Boulder, Colorado, USA
12. Department of Psychology and Neuroscience, University of Colorado, Boulder, Boulder, Colorado, USA