CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 6,2009, Pages 483-484, doi:10.3760/cma.j.issn.1007-9408.2009.06.028
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 6,2009, Pages 472-475, doi:10.3760/cma.j.issn.1007-9408.2009.06.023
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 6,2009, Pages 484-486, doi:10.3760/cma.j.issn.1007-9408.2009.06.029
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 6,2009, Pages 466-468, doi:10.3760/cma.j.issn.1007-9408.2009.06.021
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 6,2009, Pages 462, doi:10.3760/cma.j.issn.1007-9408.2009.06.019