Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 12,2012, Pages 1012-1015, doi:10.3969/j.issn.1003-6946.2012.12.010
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 12,2012, Pages 1076, doi:10.3969/j.issn.1003-6946.2012.12.031
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 12,2012, Pages 1006-1008, doi:10.3969/j.issn.1003-6946.2012.12.007
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 12,2012, Pages 1019-1022, doi:10.3969/j.issn.1003-6946.2012.12.012
Journal of Practical Obstetrics and Gynecology, Volume 28, Issue 12,2012, Pages 1053-1055, doi:10.3969/j.issn.1003-6946.2012.12.021