CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 2,2011, Pages 126-127, doi:10.3760/cma.j.issn.1007-9408.2011.02.016
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 2,2011, Pages 121-125, doi:10.3760/cma.j.issn.1007-9408.2011.02.015
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 2,2011, Pages 5-67, doi:10.3760/cma.j.issn.1007-9408.2011.02.001
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 2,2011, Pages 88-91, doi:10.3760/cma.j.issn.1007-9408.2011.02.008