Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 5,2017, Pages 339-341, doi:10.3760/cma.j.issn.0529-567x.2017.05.010
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 5,2017, Pages 294-300, doi:10.3760/cma.j.issn.0529-567x.2017.05.002
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 5,2017, Pages 344-347, doi:10.3760/cma.j.issn.0529-567x.2017.05.013
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 5,2017, Pages 337-339, doi:10.3760/cma.j.issn.0529-567x.2017.05.009
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 5,2017, Pages 351-353, doi:10.3760/cma.j.issn.0529-567x.2017.05.015