Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 4,2013, Pages 251-253, doi:10.3969/j.issn.1003-6946.2013.04.005
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 4,2013, Pages 286-289, doi:10.3969/j.issn.1003-6946.2013.04.016
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 4,2013, Pages 249-251, doi:10.3969/j.issn.1003-6946.2013.04.004
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 4,2013, Pages 302-305, doi:10.3969/j.issn.1003-6946.2013.04.020
Journal of Practical Obstetrics and Gynecology, Volume 29, Issue 4,2013, Pages 312-315, doi:10.3969/j.issn.1003-6946.2013.04.023