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(A) Example of multi-photon microscopy images (stack of 120 μm) of elastin (green) and collagen (red) fibers in the medial dissected plane of non-aneurysmal aorta, BAV ATAA and TAV ATAA in both ADV-DEL and INT-DEL layers; (B) processed image with small arrows in blue that follow the direction of collagen fibers and (C) histogram of fiber angle
