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CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 5,2006, Pages 348-350, doi:10.3760/j.issn:0529-567X.2006.05.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 5,2006, Pages 289-290, doi:10.3760/j.issn:0529-567X.2006.05.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 5,2006, Pages 339-342, doi:10.3760/j.issn:0529-567X.2006.05.014