Invited commentary: another perspective on food frequency questionnaires.
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School of Public Health, University of California, Berkeley, 426 Warren Hall, Berkeley, CA 94720-7360, USA. gblock@uclink4.berkeley.edu
D002149:Energy Intake / Q000502:physiology*; D005492:Folic Acid / Q000008:administration & dosage; D006801:Humans; D009316:National Institutes of Health (U.S.); D015203:Reproducibility of Results; D012306:Risk; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*; D014481:United States
D005492:Folic Acid