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Lateral episiotomy versus no episiotomy to reduce obstetric anal sphincter injury in vacuum-assisted delivery in nulliparous women: study protocol on a randomised controlled trial 期刊论文
发表期刊: BMJ OPEN. 出版年: 2019, 卷号: 9, 期号: 3
作者:  Bergendahl, Sandra;  Ankarcrona, Victoria;  Leijonhufvud, Asa;  Hesselman, Susanne;  Karlstrom, Sofie;  Kallner, Helena Kopp;  Wendel, Sophia Brismar
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