瑞芬太尼静脉自控镇痛与硬膜外阻滞用于分娩镇痛效果对比观察
李红良,李涛,邵伟
Medical Reserch and Education . 2013, (5): 28 -31 .  DOI: 10.3969/j.issn.1674-490X.2013.05.008