Can dexamethasone improve postoperative sleep and postoperative delirium in elderly patients undergoing robot-assisted laparoscopic radical prostatectomy? Protocol for a prospective, randomized, double-blind, controlled study. - Shi, Yaping; Sun, Qingyu; Wang, Yue; Chen, Chunting; Jin, Jianfei; Wang, Wei; Lu, Yuting; Hua, Yi; Liu, Jianming; Bian, Jinjun; Yi, Zhou (Trials, 2023)