Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 6,2013, Pages 450-453, doi:10.3969/j.issn.1003-6946.2013.06.018
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 6,2013, Pages 461-464, doi:10.3969/j.issn.1003-6946.2013.06.021
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 6,2013, Pages 471-473, doi:10.3969/j.issn.1003-6946.2013.06.024
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 6,2013, Pages 401-403, doi:10.3969/j.issn.1003-6946.2013.06.001
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 6,2013, Pages 465-468, doi:10.3969/j.issn.1003-6946.2013.06.022