Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 2,2017, Pages 130, doi:10.3760/cma.j.issn.0529-567x.2017.02.013
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 2,2017, Pages 134-137, doi:10.3760/cma.j.issn.0529-567x.2017.02.015
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 2,2017, Pages 127-129, doi:10.3760/cma.j.issn.0529-567x.2017.02.012
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 2,2017, Pages 77-81, doi:10.3760/cma.j.issn.0529-567x.2017.02.002
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 2,2017, Pages 98-102, doi:10.3760/cma.j.issn.0529-567x.2017.02.006