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BACKGROUND Food frequency questionnaires (FFQs) have been validated in pregnant women, but few studies have focused specifically on low-income women and minorities. The purpose of this study was to examine the validity of the Harvard Service FFQ (HSFFQ) among low-income American Indian and Caucasian pregnant women. METHODS The 100-item HSFFQ was(More)
The American Journal of Physiology: Gastrointestinal and Liver Physiology (ISSN-0193-1857) is published monthly (two volumes a year) by the American Physiologi-Subscriptions from outside the United States are payable in U.S. currency or full equivalent. Subscriptions are accepted on a calendar-year basis only. Single Copies; Back Issues: When available,(More)
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