Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 10,2012, Pages 852-855, doi:10.3969/j.issn.1003-6946.2012.10.019
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 10,2012, Pages 845-848, doi:10.3969/j.issn.1003-6946.2012.10.017
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 10,2012, Pages 882-885, doi:10.3969/j.issn.1003-6946.2012.10.030
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 10,2012, Pages 886-888, doi:10.3969/j.issn.1003-6946.2012.10.031
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 10,2012, Pages 834-837, doi:10.3969/j.issn.1003-6946.2012.10.014