Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 7,2011, Pages 546-549, doi:10.3969/j.issn.1003-6946.2011.07.025
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 7,2011, Pages 498-500, doi:10.3969/j.issn.1003-6946.2011.07.010
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 7,2011, Pages 482-484, doi:10.3969/j.issn.1003-6946.2011.07.002
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 7,2011, Pages 504-506, doi:10.3969/j.issn.1003-6946.2011.07.012
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 7,2011, Pages 558-560, doi:10.3969/j.issn.1003-6946.2011.07.032