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Literacy, numeracy, and portion-size estimation skills.
Huizinga MM, Carlisle AJ, Cavanaugh KL, Davis DL, Gregory RP, Schlundt DG, Rothman RL. Huizinga MM, et al. Am J Prev Med. 2009 Apr;36(4):324-8. doi: 10.1016/j.amepre.2008.11.012. Am J Prev Med. 2009. PMID: 19285197 Free PMC article.