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. 2014 Dec 10;14:929. doi: 10.1186/1471-2407-14-929

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© Lee et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Histogram showing the frequencies of serum human epidermal growth factor receptor-2 (HER2) extracellular domain (ECD) levels (ng/ml) in 2,862 patients with primary invasive breast cancer.