Pirfenidone attenuates urethral stricture after injury by inhibiting Gli2 mediated HAS2 expression in fibroblasts - Li Zhong; Yan Mengyu; Zhang Jiandong; Sun Peiwang; Liang Yujie; Mei Zhijie; Gao Wuyue; Guo Yuanyuan (Journal of Molecular Histology, 2026)