CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 5,2007, Pages 293-296, doi:10.3760/cma.j.issn.1007-9408.2007.05.002
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 5,2007, Pages 338-340, doi:10.3760/cma.j.issn.1007-9408.2007.05.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 5,2007, Pages 305-308, doi:10.3760/cma.j.issn.1007-9408.2007.05.005
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 5,2007, Pages 289-292, doi:10.3760/cma.j.issn.1007-9408.2007.05.001
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 5,2007, Pages 318-321, doi:10.3760/cma.j.issn.1007-9408.2007.05.008