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Johansen MA, Henriksen E, Berntsen G, Horsch A.Johansen MA, et al.Stud Health Technol Inform. 2011;169:13-7.Stud Health Technol Inform. 2011.PMID: 21893705Review.
Johansen MA, Berntsen GK, Schuster T, Henriksen E, Horsch A.Johansen MA, et al. Among authors: berntsen gk.J Med Internet Res. 2012 Oct 3;14(5):e126. doi: 10.2196/jmir.2216.J Med Internet Res. 2012.PMID: 23032363Free PMC article.Review.