CHINA MODERN DOCTOR, Volume 47, Issue 20,2009, Pages 161,170, doi:10.3969/j.issn.1673-9701.2009.20.094
WORLD HEALTH DIGEST, Volume 6, Issue 20,2009, Pages 79-80, doi:10.3969/j.issn.1672-5085.2009.20.101
COMPUTER KNOWLEDGE AND TECHNOLOGY, Volume 5, Issue 20,2009, Pages 5355-5356,5359, doi:10.3969/j.issn.1009-3044.2009.20.010
CHINESE JOURNAL OF MODERN DRUG APPLICATION, Volume 3, Issue 20,2009, Pages 146, doi:10.3969/j.issn.1673-9523.2009.20.118