
Effect of Low Dose Ropivacaine and Butorphanol Epidural Anesthesia on Labor Analgesia and Labor Outcome
WANG Yanping, XU Yizhen, YUAN Yingchuan, Guli·Yakefu, CHEN Zhengwen
Effect of Low Dose Ropivacaine and Butorphanol Epidural Anesthesia on Labor Analgesia and Labor Outcome
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