CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 1,2009, Pages 32-35, doi:10.3760/cma.j.issn.1007-9408.2009.01.009
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 1,2009, Pages 24-27, doi:10.3760/cma.j.issn.1007-9408.2009.01.007
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 1,2009, Pages 61-63, doi:10.3760/cma.j.issn.1007-9408.2009.01.019
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 1,2009, Pages 15-19, doi:10.3760/cma.j.issn.1007-9408.2009.01.005
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 1,2009, Pages 76-77, doi:10.3760/cma.j.issn.1007-9408.2009.01.026