1. Department of Medicine, General Internal Medicine
2. Department of Radiology, Integrated Brain Imaging Center
3. Department of Epidemiology
4. Fred Hutchinson Cancer Research Center, Public Health Sciences Division, Seattle WA
5. Department of Epidemiology, Twin Registry
6. VA Epidemiologic Research and Information Center, Vietnam Era Twin Registry, Seattle, WA
7. Department of Radiology, Magnetic Resonance Research Laboratory
8. Department of Neurology, University of Washington, Seattle, WA