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Goedel WC, Duncan DT.Goedel WC, et al. Among authors: duncan dt.JMIR Public Health Surveill. 2015 May 8;1(1):e4. doi: 10.2196/publichealth.4353. eCollection 2015 Jan-Jun.JMIR Public Health Surveill. 2015.PMID: 27227127Free PMC article.