CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 3,2009, Pages 163-164, doi:10.3760/cma.j.issn.1007-9408.2009.03.002
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 3,2009, Pages 205-208, doi:10.3760/cma.j.issn.1007-9408.2009.03.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 3,2009, Pages 209-212, doi:10.3760/cma.j.issn.1007-9408.2009.03.014
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 3,2009, Pages 221-222, doi:10.3760/cma.j.issn.1007-9408.2009.03.019
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 12, Issue 3,2009, Pages 161-162, doi:10.3760/cma.j.issn.1007-9408.2009.03.001