[Comparison of clinical efficacy of unilateral dual-channel endoscopy and large-channel endoscopy techniques in the treatment of lumbar spinal canal stenosis]. - Ren Y; Yu T; Qiu X; Chen W; Zhang W; Zhao H; Yang J; Xie Y; Tao Y; Shao W; Yang P; Ye B (Zhongguo gu shang = China journal of orthopaedics and traumatology, 2026)