Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 792-795, doi:10.3760/cma.j.issn.0529-567x.2011.10.022
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 768, doi:10.3760/cma.j.issn.0529-567x.2011.10.011
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 782-783, doi:10.3760/cma.j.issn.0529-567x.2011.10.018
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 799, doi:10.3760/cma.j.issn.0529-567x.2011.10.024
Chinese Journal of Obstetrics and Gynecology, Volume 46, Issue 10,2011, Pages 742-747, doi:10.3760/cma.j.issn.0529-567x.2011.10.006