腰-硬联合与硬膜外阻滞分娩镇痛对初产妇产程及母婴安全性的影响
毕小宝,张永福,李煜,陈金海,谭永红
Medical Reserch and Education . 2019, (4): 19 -23 .  DOI: 10.3969/j.issn.1674-490X.2019.04.004