Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 11,2011, Pages 874, doi:10.3969/j.issn.1003-6946.2011.11.028
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 11,2011, Pages 810-812, doi:10.3969/j.issn.1003-6946.2011.11.005
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 11,2011, Pages 870-873, doi:10.3969/j.issn.1003-6946.2011.11.027
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 11,2011, Pages 824-827, doi:10.3969/j.issn.1003-6946.2011.11.011
Journal of Practical Obstetrics and Gynecology, Volume 27, Issue 11,2011, Pages 866-869, doi:10.3969/j.issn.1003-6946.2011.11.026