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Naess F, Nesbakken A, Pillgram-Larsen J, Gerner T, Solheim K, Stadaas JO.Naess F, et al.Tidsskr Nor Laegeforen. 1990 May 20;110(13):1676-9.Tidsskr Nor Laegeforen. 1990.PMID: 2368048Norwegian.