中国计划生育学杂志
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低剂量氢吗啡酮用于高龄二次剖宫产术后镇痛效果
海南省琼海市人民医院(571400)
Effect of low-dose hydromorphone used for the postoperative analgesia of advanced women after the second cesarean section
Qionghai People's Hospital, Qionghai, Hainan Province, 571400