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. 2016 Apr 1;20:9. doi: 10.1186/s40824-016-0056-4

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© Choi et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — The biocompatibility of base materials of HCD matrix, in vitro, was confirmed by cytotoxicity assay of base materials such as F68, collagen and HA (a) and the HA was confirmed by agar overlay with various percentages; 0.5 %, 1 %, 1.5 %, and 2 % (b)