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. 2012 Dec 3;12:115. doi: 10.1186/1471-2261-12-115

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Copyright ©2012 Hu et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Neointima on grafts harvested 4 weeks after the surgery(× 400). White arrows indicate endothelial cells, black arrows vascular grafts, and red arrows smooth muscle cells. (A) A PU graft stained for von Willebrand factor (vWF) showing continuous endothelial layer. (B) A PTFE graft stained for vWF showing discontinuous endothelial layer. (C) A PU graft stained for α-SM-actin showing an orderly arrangement of smooth muscle cells. (D) A PTFE graft stained for α-SM-actin showing disordered arrangement of smooth muscle cells.