Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 6,2012, Pages 431-434, doi:10.3969/j.issn.1003-6946.2012.06.008
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 6,2012, Pages 496, doi:10.3969/j.issn.1003-6946.2012.06.028
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 6,2012, Pages 501-503, doi:10.3969/j.issn.1003-6946.2012.06.030
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 6,2012, Pages 425-426, doi:10.3969/j.issn.1003-6946.2012.06.005
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 6,2012, Pages 484-488, doi:10.3969/j.issn.1003-6946.2012.06.024