CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 117-118, doi:10.3760/cma.j.issn.1007-9408.1998.02.018
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CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 2,1998, Pages 87-89, doi:10.3760/cma.j.issn.1007-9408.1998.02.007
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 120-121, doi:10.3760/cma.j.issn.1007-9408.1998.02.020