Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 6,2017, Pages 386-391, doi:10.3760/cma.j.issn.0529-567x.2017.06.006
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 6,2017, Pages 392-397, doi:10.3760/cma.j.issn.0529-567x.2017.06.007
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 6,2017, Pages 424, doi:10.3760/cma.j.issn.0529-567x.2017.06.014
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 6,2017, Pages 369-373, doi:10.3760/cma.j.issn.0529-567x.2017.06.003
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 6,2017, Pages 374-378, doi:10.3760/cma.j.issn.0529-567x.2017.06.004