1. University of California, San Francisco (A.V.S., D.E.S., K.R.F., D.M.B., D.C.B.), San Francisco, California 94107
2. Hopital E. Herriot and Center for Clinical and Basic Research-Synarc (P.G.), 69003 Lyon, France
3. Kaiser Permanente Center for Health Research (T.A.H.), Portland, Oregon 97227
4. University of Pittsburgh (E.S.S.), Pittsburgh, Pennsylvania 15260
5. American Association of Homes and Services for the Aging (H.E.R.), Washington, D.C. 20008
6. University of Tennessee Health Science Center (F.A.T.), Memphis, Tennessee 38163
7. California Pacific Medical Center (S.R.C.), San Francisco, California 94115
8. National Institute on Aging (T.B.H.), Bethesda, Maryland 20892