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1 Lofthus, Cathrine Marie; Cappelen, Inger; Osnes, Eivind Kaare; Falch, Jan Arvid; Kristiansen, Ivar Sønbø; Medhus, Asle Wilhelm; Nordsletten, Lars; Meyer, Haakon E.
Local and national electronic databases in Norway demonstrate a varying degree of validity. Journal of Clinical Epidemiology 2005 ;Volume 58. p. 280-285
UiO FHI OUS Untitled