MATERNAL AND CHILD HEALTH CARE OF CHINA, Volume 24, Issue 31,2009, Pages 4460-4461,
CONTEMPORARY MEDICINE, Volume 15, Issue 31,2009, Pages 96-97, doi:10.3969/j.issn.1009-4393.2009.31.080
CHINA PRACTICAL MEDICAL, Volume 4, Issue 31,2009, Pages 16-17, doi:10.3969/j.issn.1673-7555.2009.31.009
WORLD HEALTH DIGEST, Volume 6, Issue 31,2009, Pages 42-43, doi:10.3969/j.issn.1672-5085.2009.31.033