Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 3,2014, Pages 230-232, doi:10.3760/cma.j.issn.0529-567x.2014.03.020
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 3,2014, Pages 161-162, doi:10.3760/cma.j.issn.0529-567x.2014.03.001
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 3,2014, Pages 208-212, doi:10.3760/cma.j.issn.0529-567x.2014.03.012
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 3,2014, Pages 167-171, doi:10.3760/cma.j.issn.0529-567x.2014.03.003
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 3,2014, Pages 226-228, doi:10.3760/cma.j.issn.0529-567x.2014.03.018