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2. Esophageal ulcers associated with tetracycline therapy;Crowson, T.D.; Head, L.H.; Ferrante, W.A.;JAMA,1976
3. Where do all the tablets go?;Evans, K.T.; Roberts, G.M.;Lancet,1976
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5. Aksnes EG. Beta-blokkare-farlig for skilopere ? Tidsskrift for den Norske Laegeforening,1977