Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 2,2013, Pages 120-123, doi:10.3969/j.issn.1003-6946.2013.02.014
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 2,2013, Pages 140-144, doi:10.3969/j.issn.1003-6946.2013.02.020
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 2,2013, Pages 96-98, doi:10.3969/j.issn.1003-6946.2013.02.007
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 2,2013, Pages 159-160, doi:10.3969/j.issn.1003-6946.2013.02.027
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 2,2013, Pages 93-95, doi:10.3969/j.issn.1003-6946.2013.02.006