CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 3,2004, Pages 173-174, doi:10.3760/cma.j.issn.1007-9408.2004.03.014
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 3,2004, Pages 131-133, doi:10.3760/cma.j.issn.1007-9408.2004.03.001
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 3,2004, Pages 175-177, doi:10.3760/cma.j.issn.1007-9408.2004.03.015
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 3,2004, Pages 165-167, doi:10.3760/cma.j.issn.1007-9408.2004.03.011
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 7, Issue 3,2004, Pages 182-184, doi:10.3760/cma.j.issn.1007-9408.2004.03.018