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Open Access Research

Effects of portion size on chronic energy intake

Robert W Jeffery*, Sarah Rydell, Caroline L Dunn, Lisa J Harnack, Allen S Levine, Paul R Pentel, Judith E Baxter and Ericka M Walsh

International Journal of Behavioral Nutrition and Physical Activity 2007, 4:27 doi:10.1186/1479-5868-4-27

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