CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 12,2008, Pages 883,887,891,903,927,941,
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 12,2008, Pages 944-946, doi:10.3321/j.issn:0529-567X.2008.12.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 12,2008, Pages 946,
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 12,2008, Pages 904-908, doi:10.3321/j.issn:0529-567X.2008.12.007