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Smedal T, Gjelsvik B, Lygren H, Borgmann R, Waje-Andreassen U, Grønning M.Smedal T, et al. Among authors: gjelsvik b.Tidsskr Nor Laegeforen. 2001 Nov 20;121(28):3277-80.Tidsskr Nor Laegeforen. 2001.PMID: 11826458Free article.Norwegian.