Lu Chen, Xujun Dong, Jianhua Chen, Jintao Shen, Jian Liu, Shaojin Bu, Rongdan Tan, Xin-sen Zou. "Determining the optimal ropivacaine concentration for spinal anaesthesia during day surgery for anorectal procedures: a dose-finding study." Scientific Reports (2025). https://doi.org/10.1038/s41598-025-24272-5