Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 8,2011, Pages 635-636, doi:10.3969/j.issn.1003-6946.2011.08.028
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 8,2011, Pages 618-621, doi:10.3969/j.issn.1003-6946.2011.08.022
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 8,2011, Pages 572-575, doi:10.3969/j.issn.1003-6946.2011.08.006
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 8,2011, Pages 627-630, doi:10.3969/j.issn.1003-6946.2011.08.025
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 8,2011, Pages 639-640, doi:10.3969/j.issn.1003-6946.2011.08.031