Chinese Journal of Perinatal Medicine, Volume 24, Issue 6,2021, Pages 454-460, doi:10.3760/cma.j.cn113903-20200902-00914
Chinese Journal of Perinatal Medicine, Volume 24, Issue 6,2021, Pages 461-466, doi:10.3760/cma.j.cn113903-20201205-01203
Chinese Journal of Perinatal Medicine, Volume 24, Issue 6,2021, Pages 423-426, doi:10.3760/cma.j.cn113903-20210118-00054
Chinese Journal of Perinatal Medicine, Volume 24, Issue 6,2021, Pages 480, doi:10.3760/cma.j.issn.1007-9408.2021.06.105
Chinese Journal of Perinatal Medicine, Volume 24, Issue 6,2021, Pages 434-443, doi:10.3760/cma.j.cn113903-20201023-01060