Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 5,2018, Pages 340, doi:10.3760/cma.j.issn.0529-567x.2018.05.017
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 5,2018, Pages 299-303, doi:10.3760/cma.j.issn.0529-567x.2018.05.003
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 5,2018, Pages 351-353, doi:10.3760/cma.j.issn.0529-567x.2018.05.020
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 5,2018, Pages 328-330, doi:10.3760/cma.j.issn.0529-567x.2018.05.010
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 5,2018, Pages 323-325, doi:10.3760/cma.j.issn.0529-567x.2018.05.008