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Elliott D, McKinley S, Perry L, Duffield C, Iedema R, Gallagher R, Fry M, Roche M, Allen E.Elliott D, et al.JMIR Res Protoc. 2014 Aug 12;3(3):e40. doi: 10.2196/resprot.3300.JMIR Res Protoc. 2014.PMID: 25116446Free PMC article.