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. 2020 Nov 6;99(45):e23105. doi: 10.1097/MD.0000000000023105

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Copyright © 2020 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial License 4.0 (CCBY-NC), where it is permissible to download, share, remix, transform, and buildup the work provided it is properly cited. The work cannot be used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc/4.0

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Multivariate-adjusted association of traveling to sunny areas in winter and risk of breast cancer.^[21,22] CI = confidence interval, RR = relative risk.