Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 8,2017, Pages 565, doi:10.3760/cma.j.issn.0529-567x.2017.08.013
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 8,2017, Pages 564, doi:10.3760/cma.j.issn.0529-567x.2017.08.012
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 8,2017, Pages 533-538, doi:10.3760/cma.j.issn.0529-567x.2017.08.006
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 8,2017, Pages 551-557, doi:10.3760/cma.j.issn.0529-567x.2017.08.009
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 8,2017, Pages 545-550, doi:10.3760/cma.j.issn.0529-567x.2017.08.008