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

Figure 7.

Figure 7

Internal surfaces of vascular grafts harvested 24 weeks after the surgery. (A) A PU graft showing a smooth and intact surface without thrombus or obvious neointimal hyperplasia. (B) A PTFE graft showing uneven surface and obvious neointimal hyperplasia (yellowish and stiffer).