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Wang X, Zhang H, Xie Z, Zhang Q, Jiang W, Zhang J. The effectiveness of additional thoracic paravertebral block in improving the anesthetic effects of regional anesthesia for proximal humeral fracture surgery in elderly patients: study protocol for a randomized controlled trial. Trials. 2020 Feb 19;21(1):204. PMID: 32075674; PMCID: PMC7031908. |