CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 2, Issue 2,1999, Pages 104-105, doi:10.3760/cma.j.issn.1007-9408.1999.02.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 2, Issue 2,1999, Pages 116-117, doi:10.3760/cma.j.issn.1007-9408.1999.02.019
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 2, Issue 2,1999, Pages 112-113, doi:10.3760/cma.j.issn.1007-9408.1999.02.017
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