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Hämeen-Anttila K, Nordeng H, Kokki E, Jyrkkä J, Lupattelli A, Vainio K, Enlund H.Hämeen-Anttila K, et al. Among authors: jyrkka j.J Med Internet Res. 2014 Feb 20;16(2):e60. doi: 10.2196/jmir.2939.J Med Internet Res. 2014.PMID: 24565696Free PMC article.