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Levy SS, Macera CA, Hootman JM, Coleman KJ, Lopez R, Nichols JF, Marshall SJ, Ainsworth BA, Ji M.Levy SS, et al. Among authors: nichols jf.Disabil Health J. 2012 Oct;5(4):305-11. doi: 10.1016/j.dhjo.2012.07.003. Epub 2012 Sep 12.Disabil Health J. 2012.PMID: 23021743