1. Department of Medicine, University of Washington, Seattle, Washington
2. Veterans Affairs-Puget Sound Health Care System, University of Washington, Seattle, Washington
3. Geriatric Research, Education and Clinical Center, University of Washington, Seattle, Washington
4. Department of Medicine, Harbor-UCLA Medical Center, Los Angeles Biomedical Research Institute, Torrance, California
5. General Clinical Research Center, Harbor-UCLA Medical Center, Los Angeles Biomedical Research Institute, Torrance, California
6. Division of Clinical Pharmacology and Discovery Medicine, GlaxoSmithKline Research and Development, Research Triangle Park, North Carolina