Fig. 2. Representative H&E section depicting healing process in defect area at 10-week trial (H&E staining, A–D: ×400). A, B. Fibroblastic dense collagen tissue without inflammation in control and collagen group. C, D. Grafted materials (GMs) are surrounded by foreign body reaction showing multinucleated giant cells in chronic inflammatory vascular connective tissue in Danshen and Ge Gan groups, respectively.
