Explainable AI in Medicine: A Comprehensive Narrative Review of Methods, Applications, and Future Directions. - Helin Wang; Guangze Shi; Xueyu Liu; Jianan Zhang; Sheng Chen; Jiashuo Shi; Yu-ang Li; Guanghui Yue 001; Yongfei Wu (Expert Syst. J. Knowl. Eng., 2026)