CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 5, Issue 1,2002, Pages 21-23, doi:10.3760/cma.j.issn.1007-9408.2002.01.007
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 5, Issue 1,2002, Pages 71-72, doi:10.3760/cma.j.issn.1007-9408.2002.01.026
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 5, Issue 1,2002, Pages 64-66, doi:10.3760/cma.j.issn.1007-9408.2002.01.022
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 5, Issue 1,2002, Pages 52-55, doi:10.3760/cma.j.issn.1007-9408.2002.01.017
CHINESE JOURNAL OF PERINATAL MEDICINE, Volume 5, Issue 1,2002, Pages 63, doi:10.3760/cma.j.issn.1007-9408.2002.01.034