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Tollan A, Magnus JH.Tollan A, et al.Tidsskr Nor Laegeforen. 2018 Feb 19;138(4). doi: 10.4045/tidsskr.17.1107. Print 2018 Feb 20.Tidsskr Nor Laegeforen. 2018.PMID: 29460583Free article.English, Norwegian.No abstract available.