Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 6,2016, Pages 448-453, doi:10.3760/cma.j.issn.0529-567x.2016.06.009
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 6,2016, Pages 464-466, doi:10.3760/cma.j.issn.0529-567x.2016.06.013
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 6,2016, Pages 436-441, doi:10.3760/cma.j.issn.0529-567x.2016.06.007
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 6,2016, Pages 453-453,
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 6,2016, Pages 424-430, doi:10.3760/cma.j.issn.0529-567x.2016.06.005