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Ekelund U, Brage S, Griffin SJ, Wareham NJ; ProActive UK Research Group.Ekelund U, et al.Diabetes Care. 2009 Jun;32(6):1081-6. doi: 10.2337/dc08-1895. Epub 2009 Feb 27.Diabetes Care. 2009.PMID: 19252168Free PMC article.