Weitzman, Elissa R. ScD, MSc
Department of Society, Human Development and Health, Harvard School of Public Health, Boston, MA.
Data for this research were collected with support from the Robert Wood Johnson Foundation.
Send reprint requests to Elissa R. Weitzman, ScD, MSc, Department of Society, Human Development and Health, Harvard School of Public Health, Landmark Center, Room 441, 401 Park Drive, P. O. Box 15678, Boston, MA 02215.