Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 4,2017, Pages 286-288, doi:10.3760/cma.j.issn.0529-567x.2017.04.016
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 4,2017, Pages 282-285, doi:10.3760/cma.j.issn.0529-567x.2017.04.015
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 4,2017, Pages 239-243, doi:10.3760/cma.j.issn.0529-567x.2017.04.005
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 4,2017, Pages 270-273, doi:10.3760/cma.j.issn.0529-567x.2017.04.012
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 4,2017, Pages 244-248, doi:10.3760/cma.j.issn.0529-567x.2017.04.006