More information
For more about the USDA's dietary guidelines, visit MyPyramid.
SOURCES: Ross Prentice, Ph.D., professor, biostatistics, University of Washington School of Public Health and Fred Hutchinson Cancer Research Center, Seattle, and principal investigator, Women's Health Initiative
Clinical Coordinating Center; Robert Morgan Jr., M.D., section head, medical gynecologic oncology, City of Hope Cancer Center, Duarte, Calif.; Oct. 9, 2007, online edition, Journal of the National Cancer Institute
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