Is the flipped classroom more effective than the traditional classroom in clinical medical education: a systematic review and meta-analysis - Shi, Xu-Ying; Yin, Qing; Wang, Qiu-Wen; Lu, Bing-Rui; Li, Guo-Xiang; Huang, Shu-Hong; Sun, Zhi-Gang (Frontiers in Education, 2025)