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Comment
. 2002 Jun;31(3):692-3.

The performance of a food frequency questionnaire (FFQ) with a 7-day diet diary in estimating nitrogen and potassium intake

  • PMID: 12162248
Comment

The performance of a food frequency questionnaire (FFQ) with a 7-day diet diary in estimating nitrogen and potassium intake

Nick Day. Int J Epidemiol. 2002 Jun.
No abstract available

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