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Che-Chun Su, Yo-Yu Lin, Tsun-Kuo Chang, Chi-Ting Chiang, Jian-An Chung, Yun-Ying Hsu and Ie-Bin Lian*
* Corresponding author: Ie-Bin Lian maiblian@cc.ncue.edu.tw
BMC Public Health 2010, 10:67 doi:10.1186/1471-2458-10-67