FGF2 and Esophageal stricture: On day 22, esophageal stricture was significantly suppressed in the PGA and PGA + bFGF groups compared with that in the control group (control: 63.6% [8.4], PGA: 42.2% [8.4], PGA + bFGF: 36.7% [12.9]) (Fig. 2).