1. C.-E. Yu and S. Matthews, Geriatric Research Education and Clinical Center (182B), Veterans Affairs Puget Sound Health Care System, Seattle Division, 1660 South Columbian Way, Seattle, WA 98108, USA, and Department of Neurology, University of Washington, Seattle, WA 98195, USA.
2. J. Oshima, Geriatric Research Education and Clinical Center (182B), Veterans Affairs Puget Sound Health Care System, Seattle Division, 1660 South Columbian Way, Seattle, WA 98108, USA, and Department of Pathology, University of Washington, Seattle, WA 98195, USA.
3. Y.-H. Fu, R. Alisch, J. Mulligan, Darwin Molecular Corporation, 1631 220th Street, S.E., Bothell, WA 98021, USA.
4. E. M. Wijsman, Division of Medical Genetics, Department of Medicine, and Department of Biostatistics, University of Washington, Seattle, WA 98195, USA.
5. F. Hisama, Department of Neurology, Yale University School of Medicine, New Haven, CT 06510, USA.
6. J. Nakura and T. Miki, Department of Geriatric Medicine, Osaka University Medical School, 2-2 Yamadaoka Suita, Osaka 565, Japan.
7. S. Ouais, Section of Endocrinology, Damascus City Hospital, Damascus, Syria.
8. G. M. Martin, Department of Pathology, University of Washington, Seattle, WA 98195, USA.
9. G. D. Schellenberg, Geriatric Research Education and Clinical Center (182B), Veterans Affairs Puget Sound Health Care System, Seattle Division, 1660 South Columbian Way, Seattle, WA 98108, USA, and the Departments of Medicine, Neurology, and Pharmacology, University of Washington, Seattle, WA 98195, USA.