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中文
Clinical efficacy of diverse intravertebral infusion with sufentanil and ropivacaine for labor analgesia
LI Hai-bing, LIU Zhi-qiang, CHEN Xiu-bin, et al
. 2012, (
4
): 499 . DOI: 10.3969/j.issn.1674-8115.2012.04.027