CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 4,2007, Pages 228-229, doi:10.3760/cma.j.issn.1007-9408.2007.04.004
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 4,2007, Pages 224-227, doi:10.3760/cma.j.issn.1007-9408.2007.04.003
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 4,2007, Pages 274-275, doi:10.3760/cma.j.issn.1007-9408.2007.04.018
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 4,2007, Pages 234-237, doi:10.3760/cma.j.issn.1007-9408.2007.04.006
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 10, Issue 4,2007, Pages 283-285, doi:10.3760/cma.j.issn.1007-9408.2007.04.022