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. 2015 Apr 2;7(4):2345–2358. doi: 10.3390/nu7042345

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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(a) Estimated daily quercetin intake by 570 residents of Sobetsu in Hokkaido using the FFQ during summer. (b) Estimated daily quercetin intakes by men and women using the FFQ during summer. Numbers in the figure show the median quercetin intakes by men and women. (c) Correlation between the daily quercetin intakes by men or women and their age. r, correlation coefficient; * p < 0.0001; Pearson correlation test.