Congli Tian, Jing Xue, Huiyan Cui, Hongni Ding. "Association of ultrasound-assisted combined with conventional anatomical landmark paramedian spinal anesthesia and its impact on first pass success rate in patients with lower limb fractures- A retrospective cohort study." PLoS ONE (2025). https://doi.org/10.1371/journal.pone.0334455