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Usta E, Burgstahler C, Aebert H, Schroeder S, Helber U, Kopp AF, Ziemer G.Usta E, et al.J Cardiothorac Surg. 2009 Aug 16;4:43. doi: 10.1186/1749-8090-4-43.J Cardiothorac Surg. 2009.PMID: 19682394Free PMC article.
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