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Comparative study of ropivacaine and bupivacaine for anesthesia in elderly patients with lower limb operation
Xiao Shenghong, Chen Guorong, Liu Xianbao, Zhan Hong
Lingnan Modern Clinics in Surgery . 2013, (03): 226 -228 .  DOI: 10.3969/j.issn.1009-976X.2013.03.018