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Sun Y, Lu CJ, Chen RC, Hou WH, Li CY.Sun Y, et al. Among authors: hou wh.J Epidemiol. 2015;25(6):445-51. doi: 10.2188/jea.JE20140176. Epub 2015 May 2.J Epidemiol. 2015.PMID: 25947580Free PMC article.
Fang HS, Chen WL, Chen CY, Jia CH, Li CY, Hou WH.Fang HS, et al. Among authors: hou wh.Int J Environ Res Public Health. 2015 Jul 8;12(7):7682-96. doi: 10.3390/ijerph120707682.Int J Environ Res Public Health. 2015.PMID: 26184248Free PMC article.