Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 12,2018, Pages 874-877, doi:10.3760/cma.j.issn.0529-567x.2018.12.017
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 12,2018, Pages 831-835, doi:10.3760/cma.j.issn.0529-567x.2018.12.006
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 12,2018, Pages 842-848, doi:10.3760/cma.j.issn.0529-567x.2018.12.008
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 12,2018, Pages 868, doi:10.3760/cma.j.issn.0529-567x.2018.12.014
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 12,2018, Pages 870-873, doi:10.3760/cma.j.issn.0529-567x.2018.12.016