Comparing mid-term outcomes and patient satisfaction between percutaneous endoscopic lumbar discectomy and microendoscopic discectomy for foraminal and extraforaminal lumbar disc herniations: a retrospective matched cohort study - Liu, Sen; Zhao, Feng; Yin, Chun-Ping; Zhu, Chao-Hua; Zhao, Ruo-Yu; Liu, Guo-Bin; Ji, Gang; Chen, Jia; Gao, Hong-Yang (Frontiers in Surgery, 2025)