title: Block vs Willett: a debate on the validity of food frequency questionnaires.
authors.forename: M P
authors.initials: MP
authors.lastname: Longnecker
authors.forename: M J
authors.initials: MJ
authors.lastname: Chen
authors.forename: B
authors.initials: B
authors.lastname: Caan
mesh_terms: D000328:Adult; D000368:Aged; D015930:Diet Records; D004435:Eating; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires