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3by Bernersen, B., Johnsen, R., Straume &, B., Burhol, P. G.Get access
Published in Scandinavian Journal of Gastroenterology (1992)
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9by Johnsen, R, Straume, B, Forde, O H, Burhol, P GGet access
Published in Journal of Epidemiology & Community Health (1992)
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13by Bernersen, B., Johnsen, R., Bostad, L., Straume, B., Sommer, A. I., Burhol, P. G.Get access
Published in BMJ (1992)
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