Protocol: Effects of midazolam on postoperative delirium in elderly patients undergoing spinal surgery: A randomized, double-blind, placebo-controlled non-inferiority trial. - Sheng, Chaoxu; Zhu, Miao; Yuan, Liyong; Wang, Jianlin; Hu, Bo; Huang, Xiaolu; Han, He (PLoS ONE, 2026)