1. Center for Public Health Nutrition, University of Washington, Raitt Hall, Box 353410, Seattle, WA 98105
2. Nutrition Policy Institute, University of California, Division of Agriculture and Natural Resources, 2115 Milvia Street, 3rd Floor, Berkeley, CA 94704
3. Pediatrics; Faculty, Philip R. Lee Institute for Health Policy Studies, University of California, 265 Welch Rd. MSOB X240, Mailcode 5459, Stanford, San Francisco, CA 94305‐5459