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Fig. 4

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The microstructures of the porous PCL-1-50 external vascular scaffold in different degradation times (×500), a: 0d, b: 10 min, c: 1d, d: 3d, e: 5d, f: 7d.
The microstructures of the porous PCL-1-50 external vascular scaffold in different degradation times (×500), a: 0d, b: 10 min, c: 1d, d: 3d, e: 5d, f: 7d.