CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 683-686, doi:10.3760/j.issn:0529-567X.2002.11.014
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 662, doi:10.3760/j.issn:0529-567X.2002.11.022
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 699-700, doi:10.3760/j.issn:0529-567X.2002.11.021
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 701-702, doi:10.3760/j.issn:0529-567X.2002.11.024
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 650-652, doi:10.3760/j.issn:0529-567X.2002.11.004