CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 6,2007, Pages 408-412, doi:10.3760/cma.j.issn.1007-9408.2007.06.012
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 6,2007, Pages 412-414, doi:10.3760/cma.j.issn.1007-9408.2007.06.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 6,2007, Pages 375-377,插1, doi:10.3760/cma.j.issn.1007-9408.2007.06.004
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 6,2007, Pages 404-407,插2, doi:10.3760/cma.j.issn.1007-9408.2007.06.011