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Albrecht UV, Folta-Schoofs K, Behrends M, von Jan U.Albrecht UV, et al. Among authors: folta schoofs k.J Med Internet Res. 2013 Aug 20;15(8):e182. doi: 10.2196/jmir.2497.J Med Internet Res. 2013.PMID: 23963306Free PMC article.Clinical Trial.