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. 2014 Nov 26;12:44. doi: 10.1186/s12951-014-0044-6

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

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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Spiked-CEA-concentration-in-serum, ϕ _CEA , and (a) IMR signal and (b) the CEA concentration, ϕ _CEA-IMR , derived using the immunomagnetic reduction method.