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Norman GJ, Adams MA, Kerr J, Ryan S, Frank LD, Roesch SC.Norman GJ, et al. Among authors: kerr j.J Public Health Manag Pract. 2010 Sep-Oct;16(5):411-9. doi: 10.1097/PHH.0b013e3181c60e92.J Public Health Manag Pract. 2010.PMID: 20689390Free PMC article.