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Bertelsen JB, Refsgaard J, Kanstrup H, Johnsen SP, Qvist I, Christensen B, Christensen KL.Bertelsen JB, et al. Among authors: christensen kl, christensen b.Dan Med J. 2013 Sep;60(9):A4699.Dan Med J. 2013.PMID: 24001464Free article.Clinical Trial.
Ebert JF, Huibers L, Christensen B, Christensen MB.Ebert JF, et al. Among authors: christensen mb, christensen b.J Med Internet Res. 2018 Jan 23;20(1):e24. doi: 10.2196/jmir.8353.J Med Internet Res. 2018.PMID: 29362206Free PMC article.