Article Text
Causation
Long term dietary folate decreased risk of colon cancer in women
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Footnotes
Source of funding: in part, National Institutes of Health.
For correspondence: Dr E Giovannucci, Channing Laboratory, 181 Longwood Avenue, Boston, MA 02115, USA. Fax +1 617 432 2435.
A modified version of this abstract appears in ACP Journal Club.