Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 3,2017, Pages 164-167, doi:10.3760/cma.j.issn.0529-567x.2017.03.005
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 3,2017, Pages 153-158, doi:10.3760/cma.j.issn.0529-567x.2017.03.003
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 3,2017, Pages 211-212, doi:10.3760/cma.j.issn.0529-567x.2017.03.017
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 3,2017, Pages 207-210, doi:10.3760/cma.j.issn.0529-567x.2017.03.016