CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 12,2001, Pages 721-722, doi:10.3760/j.issn:0529-567X.2001.12.005
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 12,2001, Pages 723-726, doi:10.3760/j.issn:0529-567X.2001.12.006
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 12,2001, Pages 755-756, doi:10.3760/j.issn:0529-567X.2001.12.019
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 12,2001, Pages 747,
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 12,2001, Pages 737,