CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 38, Issue 8,2003, Pages 478-480, doi:10.3760/j.issn:0529-567X.2003.08.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 38, Issue 8,2003, Pages 516-520, doi:10.3760/j.issn:0529-567X.2003.08.032
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 38, Issue 8,2003, Pages 521-522, doi:10.3760/j.issn:0529-567X.2003.08.033
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 38, Issue 8,2003, Pages 461-462, doi:10.3760/j.issn:0529-567X.2003.08.008
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 38, Issue 8,2003, Pages 451-455, doi:10.3760/j.issn:0529-567X.2003.08.003