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. 2011 Sep 8;6(9):e24046. doi: 10.1371/journal.pone.0024046

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Di Marco et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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EPC levels were directly quantified from whole blood taken from control subjects and patients (RTx) by flow cytometry, which identifies EPCs according to the expression of cell surface antigens, such as (A) CD133⁺ and VEGF-R2⁺; and (B) CD34⁺ and VEGF-R2⁺. P value compared to control group is indicated (Mann-Whitney test).