CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 2,2001, Pages 85-88, doi:10.3760/j.issn:0529-567X.2001.02.006
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 2,2001, Pages 118-119, doi:10.3760/j.issn:0529-567X.2001.02.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 2,2001, Pages 119-120, doi:10.3760/j.issn:0529-567X.2001.02.019
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 2,2001, Pages 82-83, doi:10.3760/j.issn:0529-567X.2001.02.005
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 2,2001, Pages 104-107, doi:10.3760/j.issn:0529-567X.2001.02.012