OCCUPATION AND HEALTH, Volume 24, Issue 20,2008, Pages 2132-2133, doi:10.3969/j.issn.1004-1257.2008.20.006
GUANGDONG SCIENCE & TECHNOLOGY, , Issue 20,2008, Pages 71, doi:10.3969/j.issn.1006-5423.2008.20.030
JILIN MEDICAL JOURNAL, Volume 29, Issue 20,2008, Pages 1718-1719, doi:10.3969/j.issn.1004-0412.2008.20.014
MODERN MEDICINE & HEALTH, Volume 24, Issue 20,2008, Pages 3015-3016,