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Published in final edited form as: Matrix Biol. 2015 Jan 5;42:56–73. doi: 10.1016/j.matbio.2014.12.002
© 2015 Elsevier B.V.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).