Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 1,2013, Pages 9-11, doi:10.3969/j.issn.1003-6946.2013.01.005
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 1,2013, Pages 15-17, doi:10.3969/j.issn.1003-6946.2013.01.007
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 1,2013, Pages 49-52, doi:10.3969/j.issn.1003-6946.2013.01.018
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 1,2013, Pages 76-77, doi:10.3969/j.issn.1003-6946.2013.01.029
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 1,2013, Pages 48, doi:10.3969/j.issn.1003-6946.2013.01.017