CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 4, Issue 3,2001, Pages 157, doi:10.3760/cma.j.issn.1007-9408.2001.03.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 4, Issue 3,2001, Pages 167-169, doi:10.3760/cma.j.issn.1007-9408.2001.03.017
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 4, Issue 3,2001, Pages 163-166, doi:10.3760/cma.j.issn.1007-9408.2001.03.016
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 4, Issue 3,2001, Pages 170-172, doi:10.3760/cma.j.issn.1007-9408.2001.03.018
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 4, Issue 3,2001, Pages 150, doi:10.3760/cma.j.issn.1007-9408.2001.03.007