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. 2014 Jun 13;9(6):e100065. doi: 10.1371/journal.pone.0100065

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© 2014 Zhang et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A Scanning electron microscopic appearance of the outflow side of a ePTFE valve cusp showing polyporous structure of ePTFE and no obvious cell or tissue attachment (×5000). B Transmission electron microscopic appearance of the outflow side of a ePTFE valve cusp showing polyporous structure of ePTFE and no obvious cell or tissue infiltration. (×1500).