Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 1,2015, Pages 9-11, doi:10.3760/cma.j.issn.0529-567x.2015.01.003
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 1,2015, Pages 17-21, doi:10.3760/cma.j.issn.0529-567x.2015.01.005
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 1,2015, Pages 37-40, doi:10.3760/cma.j.issn.0529-567x.2015.01.009
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 1,2015, Pages 48-53, doi:10.3760/cma.j.issn.0529-567x.2015.01.011
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 1,2015, Pages 3-8, doi:10.3760/cma.j.issn.0529-567x.2015.01.002