Fig. 4. Comparison between short- and long-term results. (A) Capillary ratio, (B) arteriole ratio, (C) PDGF-positive cell count, (D) VEGF-positive cell count, and (E) PCNA-positive cell count. The capillary and arteriole ratios were decreased at six months compared to eight weeks in all groups. However, angiogenic factors were significantly increased at six months compared to eight weeks. Error bars: standard deviation; (*P＜0.05).