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Michelsen S, Knutsen KM, Stugaard M, Otterstad JE.Michelsen S, et al. Among authors: knutsen km.Eur Heart J. 1990 Mar;11(3):241-8. doi: 10.1093/oxfordjournals.eurheartj.a059690.Eur Heart J. 1990.PMID: 2138544
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