Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 12,2017, Pages 805-810, doi:10.3760/cma.j.issn.0529-567x.2017.12.003
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 12,2017, Pages 793-800, doi:10.3760/cma.j.issn.0529-567x.2017.12.001
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 12,2017, Pages 818-821, doi:10.3760/cma.j.issn.0529-567x.2017.12.005
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 12,2017, Pages 848, doi:10.3760/cma.j.issn.0529-567x.2017.12.010
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 12,2017, Pages 828-834, doi:10.3760/cma.j.issn.0529-567x.2017.12.007