Chang et al. Annals of Occupational and Environmental Medicine 2013, 25:5 http: www.aoemj.com contentRESEARCH ARTICLE Open Access - Annals of Medicine - Document - PDFSEARCH.IO

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Chang et al. Annals of Occupational and Environmental Medicine 2013, 25:5 http://www.aoemj.com/contentRESEARCH ARTICLE Open AccessAdd to Reading List