Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 1,2018, Pages 62-64, doi:10.3760/cma.j.issn.0529-567x.2018.01.015
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 1,2018, Pages 2-6, doi:10.3760/cma.j.issn.0529-567x.2018.01.002
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 1,2018, Pages 50, doi:10.3760/cma.j.issn.0529-567x.2018.01.011
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 1,2018, Pages 23-30, doi:10.3760/cma.j.issn.0529-567x.2018.01.006
Chinese Journal of Obstetrics and Gynecology, Volume 53, Issue 1,2018, Pages 65-70, doi:10.3760/cma.j.issn.0529-567x.2018.01.016