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© 2014 by the author(s). This open access article is distributed under a Creative Commons Attributio...
Copyright © 2014 Alexander P. Lysenko et al. This is an open access article distributed under the Cr...
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-C...
This is an open-access article distributed under the terms of the Creative Commons Attribution Licen...
License (creativecommons.org/licenses/by/3.0/pl/), which permits redistribution, commercial and non ...
© The Author(s) 2015. This article is published with open access at Springerlink.com. This article i...
© 2013 by the author(s). This open access article is distributed under a Creative Commons Attributio...
rap.sagepub.com Creative Commons NonCommercial-NoDerivs CC-BY-NC-ND: This article is distributed und...
©2014 BMJ Publishing Group Ltd. This is an Open Access distributed in accordance with the terms of t...
Copyright © 2014 Koirala et al. This is an open-access article distributed under the terms of the Cr...
© 2014 by the author(s). This open access article is distributed under a Creative Commons Attributio...
© The Author(s) 2014. This article is published with open access at Springerlink.com This article is...
© December 2014 by the author(s). This open access article is distributed under a Creative Commons A...
This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 P...
Copyright © 2014 Xin-She Yang et al. This is an open access article distributed under the Creative C...
© 2014 by the author(s). This open access article is distributed under a Creative Commons Attributio...
Copyright © 2014 Alexander P. Lysenko et al. This is an open access article distributed under the Cr...
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