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Verhoeff-Van Gieson staining of elastin fibrils (black) within: (A) SIS, (B) seeded SIS treated with VEGF for 7 days stretched at 0.1 Hz for 7 days, and (C) seeded SIS treated with FGF-2 for 7 days and then stretched at 0.1 Hz for 7 days. Black arrows indicate presence of elastin. Images are representative from n = 4 per group and are reduced from 400 ×. Scale bar represents 50 μm.
