1. San Francisco Veterans Affairs Medical Center, San Francisco, California2Division of General Internal Medicine, Department of Medicine, University of California San Francisco
2. Department of Neurology, Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California4Department of Neurology, University of California Los Angeles
3. San Francisco Veterans Affairs Medical Center, San Francisco, California5Department of Ophthalmology, University of California San Francisco
4. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas10Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas
5. Veterans Health Administration Health Services Research and Development Service Center of Excellence on Implementing Evidence-Based Practice, Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana7Department of Neurology, Indiana Univ
6. Department of Surgery, University of Nebraska Medical Center, Omaha12Omaha–Veterans Affairs Nebraska–Western Iowa Health Care System, Omaha, Nebraska
7. San Francisco Veterans Affairs Medical Center, San Francisco, California
8. Puget Sound Veterans Affairs Medical Center, Seattle, Washington15School of Public Health, University of Washington, Seattle
9. Veterans Health Administration Health Services Research and Development Service Center of Excellence on Implementing Evidence-Based Practice, Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana8Department of Internal Medicine, Indi