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Naess O, Grünfeld TB, Beraki K, Gjøen K, Flikke M, Orstavik I, Paulssen EJ, Gautvik KM.Naess O, et al. Among authors: orstavik i.Tidsskr Nor Laegeforen. 1989 Jan 20;109(2):183-5.Tidsskr Nor Laegeforen. 1989.PMID: 2916194Norwegian.