Commentary: Flawed study designs are not salvaged by large samples.
Willett
Walter C
WC
Department of Nutrition, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115, USA.
D015982:Bias; D015415:Biomarkers / Q000097:blood; D004032:Diet; D015930:Diet Records; D015340:Epidemiologic Research Design; D006801:Humans; D018401:Sample Size; D011795:Surveys and Questionnaires
D015415:Biomarkers