CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 117-118, doi:10.3760/cma.j.issn.1007-9408.1998.02.018
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 120-121, doi:10.3760/cma.j.issn.1007-9408.1998.02.020
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 83-86, doi:10.3760/cma.j.issn.1007-9408.1998.02.006
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 74-76, doi:10.3760/cma.j.issn.1007-9408.1998.02.003
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 123, doi:10.3760/cma.j.issn.1007-9408.1998.02.022