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Kolbe-Alexander TL, Proper KI, Lambert EV, van Wier MF, Pillay JD, Nossel C, Adonis L, Van Mechelen W.Kolbe-Alexander TL, et al.BMC Public Health. 2012 May 24;12:372. doi: 10.1186/1471-2458-12-372.BMC Public Health. 2012.PMID: 22625844Free PMC article.Clinical Trial.