Calibration of a semi-quantitative food frequency questionnaire in early pregnancy
From the Department of Nutrition, Harvard School of Public Health (W.W.F., W.C.W., M.W.G.); Department of Epidemiology, Harvard School of Public Health (W.W.F., J.W.R-E., W.C.W.); and the Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care (S.L.R-S., J.W.R-E., M.W.G.), Boston, MA.
Received 24 January 2003; accepted 29 January 2004. published online 19 August 2004.
This study was funded by a grant from NIH (HL34568) and Harvard Medical School and the Harvard Pilgrim Health Care Foundation, Boston, MA. Dr. Gillman was a Robert Wood Johnson Generalist Physician Faculty Scholar at the time this work was performed.
PII: S1047-2797(04)00057-2
doi:10.1016/j.annepidem.2004.03.001
© 2004 Elsevier Inc. All rights reserved.
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