Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 3,2021, Pages 212-215, doi:10.3760/cma.j.cn112141-20200903-00690
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 3,2021, Pages 216-218, doi:10.3760/cma.j.cn112141-20200909-00701
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 3,2021, Pages 185-191, doi:10.3760/cma.j.cn112141-20200723-00597
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 3,2021, Pages 171-177, doi:10.3760/cma.j.cn112141-20200903-00689
Chinese Journal of Obstetrics and Gynecology, Volume 56, Issue 3,2021, Pages 226-229, doi:10.3760/cma.j.cn112141-20200723-00598