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Pittman TP, Nykiforuk CI, Mignone J, Mandhane PJ, Becker AB, Kozyrskyj AL.Pittman TP, et al.Int J Environ Res Public Health. 2012 Feb;9(2):579-95. doi: 10.3390/ijerph9020579. Epub 2012 Feb 16.Int J Environ Res Public Health. 2012.PMID: 22470311Free PMC article.