CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 07,2011, Pages 385-389, Dol:10.3760/cma.j.issn.1007-9408.2011.07.001
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 07,2011, Pages 390-395, Dol:10.3760/cma.j.issn.1007-9408.2011.07.002
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 07,2011, Pages 396-402, Dol:10.3760/cma.j.issn.1007-9408.2011.07.003
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 07,2011, Pages 403-408, Dol:10.3760/cma.j.issn.1007-9408.2011.07.004
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 14, Issue 07,2011, Pages 409-411, Dol:10.3760/cma.j.issn.1007-9408.2011.07.005