1. California Pacific Medical Center Research Institute, San Francisco, CA, USA
2. Laboratory of Neurogenetics, Intramural Research Program, National Institute on Aging, Bethesda, MD, USA
3. Buck Institute for Research on Aging, Novato, CA, USA
4. Memory and Aging Center, Department of Neurology, University of California, San Francisco, CA, USA
5. Institute for Human Genetics, University of California, San Francisco, CA, USA
6. The University of Tennessee Health Science Center, Memphis, TN, USA
7. Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
8. Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC, USA
9. Laboratory of Epidemiology, Demography, and Biometry, National Institute on Aging, Bethesda, MD, USA
10. Departments of Psychiatry, Neurology, and Epidemiology, University of California, and the San Francisco VA Medical Center, San Francisco, CA, USA