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Kildahl-Andersen O, Thorstensen K, Sagen E, Dahl IM, Tjønnfjord G.Kildahl-Andersen O, et al. Among authors: thorstensen k.Tidsskr Nor Laegeforen. 2006 Nov 16;126(22):2958-9.Tidsskr Nor Laegeforen. 2006.PMID: 17144048Norwegian.