CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 2,2004, Pages 86-88, doi:10.3760/cma.j.issn.1007-9408.2004.02.006
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 2,2004, Pages 123-125, doi:10.3760/cma.j.issn.1007-9408.2004.02.021
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 2,2004, Pages 112-113, doi:10.3760/cma.j.issn.1007-9408.2004.02.016
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 2,2004, Pages 75-78, doi:10.3760/cma.j.issn.1007-9408.2004.02.003
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 2,2004, Pages 92-95, doi:10.3760/cma.j.issn.1007-9408.2004.02.008