All data were analyzed using IBM Statistical Program for Social Sciences 20.0 (IBM Corp., Armonk, NY, USA). The results were shown as the mean ± standard deviation. Data from the same group at different time points and data from multiple groups at the same time point were analyzed by one-way ANOVA test. The contrast between two groups used Students’ t test. P values were considered significant when less than 0.05.
Copyright and License information: The Author(s). ©2017 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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