1. From the Surveillance Research Program, Division of Cancer Control and Population Sciences (N.H., G.F., K.A.C., A.B.M., E.J.F.) and Office of the Director (D.R.L.), National Cancer Institute, Bethesda, MD; Massachusetts General Hospital, Harvard Medical School, Boston (M.J.M., C.Y.K.); and the Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor (R.M.).