The median effective dose of oxycodone for acute postoperative pain after thoracoscopic pulmonary surgery with intercostal nerve blockin in patients of different ages: a dose-finding study protocol. - Zhang, Min; Liu, Yi; Cao, Jing; Liu, Mengjie; Gao, Xiaojun; Guo, Na; Wei, Chuansong; Zhu, Ye; Sun, Yongtao; Wu, Jianbo (BMC Anesthesiology, 2025)