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. 2012 Jul 19;3(3):480–496. doi: 10.3390/jfb3030480

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Assessment of bioreactor functionality by endoscopic observation: Functional efficiency of the bioreactor was demonstrated by perfect closure (a) and opening of the heart valve (b–d). Scale bars = 5 mm.