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Jie Wu, Ling Qiu*, Wen-hua Yan, Xin-qi Cheng, Wei Wu, Xiu-zhi Guo, Hai-tao Ding, Hui-juan Han, Shao-mei Han and Guang-jin Zhu
Corresponding author: Ling Qiu email@example.com
BMC Public Health 2013, 13:294
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