Chinese Journal of Obstetrics and Gynecology, Volume 55, Issue 2,2020, Pages 129-133, doi:10.3760/cma.j.issn.0529-567X.2020.02.013
Chinese Journal of Obstetrics and Gynecology, Volume 55, Issue 2,2020, Pages 91-93, doi:10.3760/cma.j.issn.0529-567X.2020.02.006
Chinese Journal of Obstetrics and Gynecology, Volume 55, Issue 2,2020, Pages 142-144, doi:10.3760/cma.j.issn.0529-567X.2020.02.017
Chinese Journal of Obstetrics and Gynecology, Volume 55, Issue 2,2020, Pages 81-82, doi:10.3760/cma.j.issn.0529-567X.2020.02.004
Chinese Journal of Obstetrics and Gynecology, Volume 55, Issue 2,2020, Pages 125-129, doi:10.3760/cma.j.issn.0529-567X.2020.02.012