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Persheim MS, Helland A, Spigset O, Slørdal L.Persheim MS, et al. Among authors: helland a.Tidsskr Nor Laegeforen. 2013 Jan 22;133(2):150-4. doi: 10.4045/tidsskr.12.0658.Tidsskr Nor Laegeforen. 2013.PMID: 23344597Free article.Norwegian.
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