CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 6,2004, Pages 392-401,
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 6,2004, Pages 356-360, doi:10.3760/cma.j.issn.1007-9408.2004.06.010
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 6,2004, Pages 379, doi:10.3760/cma.j.issn.1007-9408.2004.06.030
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 6,2004, Pages 349-352, doi:10.3760/cma.j.issn.1007-9408.2004.06.008
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 6,2004, Pages 323-326, doi:10.3760/cma.j.issn.1007-9408.2004.06.001