CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 11,2010, Pages 801-803, doi:10.3760/cma.j.issn.0529-567x.2010.11.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 11,2010, Pages 879, doi:10.3760/cma.j.issn.0529-567x.2010.11.021
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 11,2010, Pages 813-816, doi:10.3760/cma.j.issn.0529-567x.2010.11.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 11,2010, Pages 854-859, doi:10.3760/cma.j.issn.0529-567x.2010.11.013