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不同剂量罗哌卡因复合芬太尼行阶梯式分娩镇痛效果比较
赵 君 钱燕宁*
Effect comparison of the different doses of ropivacaine combined with fentanyl for stepwise labor analgesia
ZHAO Jun, QIAN Yanning
中国计划生育学杂志 . 2023, (7): 1606 .