© 2001 by Oxford University Press
Journal of the National Cancer Institute, Vol. 93, No. 10, 791-792,
May 16, 2001
© 2001 Oxford University Press
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Affiliation of authors: Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD.
Correspondence to: Arthur Schatzkin, M.D., Dr.P.H., National Institutes of Health, Executive Plaza North, 6130 Executive Blvd., Rm. 211, Rockville, MD 20852. (e-mail: Schatzkina@exchange.nih.gov).
Nelson et al. argue that, even though some recent observational (1) and experimental (2) epidemiologic studies have yielded null results, pessimism about diet and cancer is unwarranted because colorectal cancer incidence has been declining in the United States. Ecologic (aggregate) studies, including those of
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