Optimizing the superior trunk block for arthroscopic shoulder surgery: a randomized, double-blind comparison of low- vs. conventional-dose ropivacaine on anesthesia, analgesia, and diaphragmatic function. - Zhang, Jinxiang; Zhou, Yangyang; Ding, Peng; Zheng, Dongyu; Zhu, Hongwei; Gong, Ming; Yang, Liye; Li, Yonghua (BMC Anesthesiology, 2025)