Mixed reality-assisted versus landmark-guided spinal puncture in elderly patients: protocol for a stratified randomized controlled trial.Published in:Trials, 2024, v. 42, n. 8, p. 1, doi. 10.1186/s13063-024-08628-2By:Gao, Lei;Zhang, Haichao;Xu, Yidi;Dong, Yanjun;Sheng, Lu;Fan, Yongqian;Qin, Chunhui;Gu, WeidongPublication type:Article