HEALTH VOCATIONAL EDUCATION, Volume 25, Issue 21,2007, Pages 31, doi:10.3969/j.issn.1671-1246.2007.21.017
MODERN MEDICINE & HEALTH, Volume 23, Issue 21,2007, Pages 3253-3254, doi:10.3969/j.issn.1009-5519.2007.21.075
JOURNAL OF ANHUI AGRICULTURAL SCIENCES, Volume 35, Issue 21,2007, Pages 6498-6499, doi:10.3969/j.issn.0517-6611.2007.21.078
CHINA PRACTICAL MEDICINE, Volume 2, Issue 21,2007, Pages 98, doi:10.3969/j.issn.1673-7555.2007.21.099