CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 13, Issue 1,2010, Pages 20-23, doi:10.3760/cma.j.issn.1007-9408.2010.01.007
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 13, Issue 1,2010, Pages 69-71, doi:10.3760/cma.j.issn.1007-9408.2010.01.022
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 13, Issue 1,2010, Pages 16-19, doi:10.3760/cma.j.issn.1007-9408.2010.01.006
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 13, Issue 1,2010, Pages 12-15, doi:10.3760/cma.j.issn.1007-9408.2010.01.005