Effect of age on the efficacy and safety of Panax notoginseng saponins in acute ischemic stroke: a prespecified secondary analysis of the PANDA study. - Li, Tingting; Wang, Anxin; Zhang, Xiaoli; Feng, Luda; Du, Peipei; Gao, Ying; Ji, Xunming; Song, Haiqing; Zhang, Chi (Chinese Medicine, 2025)