Li, Xinyang, and Jing Lu. “To Study the ED50 Value of Ropivacaine for Unilateral Spinal Anesthesia in Elderly Patients With Different Heights Undergoing Total Knee Arthroplasty”. Molecular & Cellular Biomechanics 22, no. 4 (March 6, 2025): 1604. Accessed April 21, 2025. https://ojs.sin-chn.com/index.php/mcb/article/view/1604.