Fig. 5From: No midterm advantages in the middle term using small intestinal submucosa and human amniotic membrane in Achilles tendon transverse tenotomyHistological sections with hematoxylin and eosin staining (a) and immunohistochemical staining (b) for collagen type I at 7, 14, 28, and 56 days. Scale bar, 100 μm. c The immunofluorescent stain of CD31 at postoperative 3, 7, and 9 days in two groups. *p < 0.05, **p < 0.01Back to article page