CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 1,1998, Pages 61-63, doi:10.3760/cma.j.issn.1007-9408.1998.01.019
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 1,1998, Pages 54-56, doi:10.3760/cma.j.issn.1007-9408.1998.01.016
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 1,1998, Pages 57, doi:10.3760/cma.j.issn.1007-9408.1998.01.017
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 1,1998, Pages 42-45, doi:10.3760/cma.j.issn.1007-9408.1998.01.013
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 1, Issue 1,1998, Pages 50-53, doi:10.3760/cma.j.issn.1007-9408.1998.01.015