CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 8, Issue 4,2005, Pages 221-225, doi:10.3760/cma.j.issn.1007-9408.2005.04.003
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 8, Issue 4,2005, Pages 264-265, doi:10.3760/cma.j.issn.1007-9408.2005.04.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 8, Issue 4,2005, Pages 269-271, doi:10.3760/cma.j.issn.1007-9408.2005.04.016
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 8, Issue 4,2005, Pages 267-269, doi:10.3760/cma.j.issn.1007-9408.2005.04.015