Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 12,2016, Pages 881-886, doi:10.3760/cma.j.issn.0529-567x.2016.12.001
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 12,2016, Pages 946-949, doi:10.3760/cma.j.issn.0529-567x.2016.12.014
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 12,2016, Pages 895-900, doi:10.3760/cma.j.issn.0529-567x.2016.12.004
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 12,2016, Pages 887-889, doi:10.3760/cma.j.issn.0529-567x.2016.12.002
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 12,2016, Pages 909-913, doi:10.3760/cma.j.issn.0529-567x.2016.12.006