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Assessing the validity of a self-administered food-frequency questionnaire (FFQ) in the adult population of Newfoundland and Labrador, Canada

Lin Liu, Peizhong Peter Wang*, Barbara Roebothan, Ann Ryan, Christina Sandra Tucker, Jennifer Colbourne, Natasha Baker, Michelle Cotterchio, Yanqing Yi and Guang Sun

Nutrition Journal 2013, 12:49  doi:10.1186/1475-2891-12-49

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