CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 6, Issue 3,2003, Pages 190-192, doi:10.3760/cma.j.issn.1007-9408.2003.03.021
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 6, Issue 3,2003, Pages 150-152, doi:10.3760/cma.j.issn.1007-9408.2003.03.006
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 6, Issue 3,2003, Pages 155-156, doi:10.3760/cma.j.issn.1007-9408.2003.03.009
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 6, Issue 3,2003, Pages 134-137, doi:10.3760/cma.j.issn.1007-9408.2003.03.002
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 6, Issue 3,2003, Pages 131-133, doi:10.3760/cma.j.issn.1007-9408.2003.03.001