JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 8,2006, Pages 455-456, doi:10.3969/j.issn.1003-6946.2006.08.004
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 8,2006, Pages 493-494, doi:10.3969/j.issn.1003-6946.2006.08.028
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 8,2006, Pages 483-483, doi:10.3969/j.issn.1003-6946.2006.08.026
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 8,2006, Pages 456-458, doi:10.3969/j.issn.1003-6946.2006.08.005
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 8,2006, Pages 472-474, doi:10.3969/j.issn.1003-6946.2006.08.011