1. Yale School of Medicine, New Haven, and Clinical Epidemiology Research Center, VA Connecticut Healthcare System, West Haven, Connecticut (T.R.F.)
2. Cancer Prevention Research Center, College of Health Sciences, University of Rhode Island, Kingston, Rhode Island (A.L.P., C.A.R., J.S.R.)
3. Clinical Epidemiology Research Center, VA Connecticut Healthcare System, West Haven, and Yale School of Medicine, New Haven, Connecticut (L.I., J.O., M.Z.)
4. College of Health Sciences, University of Rhode Island, Kingston, Rhode Island (M.M.R.)
5. Yale School of Medicine, New Haven, Connecticut (S.M.).