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Dale E, Hårsaker V, Kristoffersen DT, Bruland O, Olsen DR.Dale E, et al. Among authors: kristoffersen dt.Strahlenther Onkol. 2010 Mar;186(3):163-8. doi: 10.1007/s00066-010-2040-6. Epub 2010 Feb 22.Strahlenther Onkol. 2010.PMID: 20165821Clinical Trial.
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Treweek S, Flottorp S, Fretheim A, Håvelsrud K, Kristoffersen DT, Oxman A, Aasland OG.Treweek S, et al. Among authors: kristoffersen dt.Tidsskr Nor Laegeforen. 2005 Feb 3;125(3):300-3.Tidsskr Nor Laegeforen. 2005.PMID: 15702152Free article.Norwegian.
Treweek S, Flottorp S, Fretheim A, Håvelsrud K, Kristoffersen DT, Oxman A, Aasland OG.Treweek S, et al. Among authors: kristoffersen dt.Tidsskr Nor Laegeforen. 2005 Feb 3;125(3):304-6.Tidsskr Nor Laegeforen. 2005.PMID: 15702153Free article.Norwegian.