1. National Cancer Institute, Rockville, Maryland (M.S.S., A.T.H., P.S.A., J.S.A., M.G., N.D.F., A.B.D.)
2. Pacific Institute for Research and Evaluation, Albuquerque, New Mexico (E.A.H.)
3. National Institute on Minority Health and Health Disparities, Bethesda, Maryland (A.M.N., E.J.P.).