1. Department of Nutrition, Harvard School of Public Health, Boston, MA.
2. Department of Social and Behavioral Science, Harvard School of Public Health, Boston, MA.
3. Division of Community Health and Human Development, School of Public Health, University of California, Berkeley, CA.
4. Division of General Academic Pediatrics, Department of Pediatrics, Massachusetts General Hospital for Children, Boston, MA.
5. Department of Population Medicine, Harvard Pilgrim Health Care Institute and Harvard Medical School, Boston, MA.
6. Bureau of Community Health and Prevention, Massachusetts Department of Public Health, Boston, MA.
7. National Initiative for Children's Health Quality, Boston, MA.