Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 5,2016, Pages 390-393, doi:10.3760/cma.j.issn.0529-567x.2016.05.016
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 5,2016, Pages 331-338, doi:10.3760/cma.j.issn.0529-567x.2016.05.003
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 5,2016, Pages 339-344, doi:10.3760/cma.j.issn.0529-567x.2016.05.004
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 5,2016, Pages 397-400, doi:10.3760/cma.j.issn.0529-567x.2016.05.018
Chinese Journal of Obstetrics and Gynecology, Volume 51, Issue 5,2016, Pages 385-385, doi:10.3760/cma.j.issn.0529-567x.2016.05.014