CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 03,2009, Pages 191-195, Dol:10.3760/cma.j.issn.0529-567x.2009.03.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 03,2009, Pages 196-199, Dol:10.3760/cma j.issn.0529-567x.2009.03.010
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 03,2009, Pages 200-203, Dol:10.3760/cma.j.issn.0529-567x.2009.03.011
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 03,2009, Pages 204-208, Dol:10.3760/ema.j.issn.0529-567x.2009.03.012
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 03,2009, Pages 209-213, Dol:10.3760/cma.j.issn.0529-567x 2009.03.013