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Reprints and Permissions
Information for Reprints and Permissions

Copyright ? The author(s) 2013-2019. Published by Xia & He Publishing Inc. All rights reserved. Articles published by all Xia & He journals are distributed under the terms of the CC BY-NC 4.0 license (http://creativecommons.org/licenses/by-nc/4.0/), which permits use, distribution, and reproduction in any medium, provided the original work is properly cited and the use is non-commercial and otherwise in compliance with the license.

Article reprints are an exact replica of the article as it appears in the published journal, with cover included. High-quality copies of articles are available upon request to the publisher. Permission to publish or advertise articles or portions of articles is granted on a case-by-case basis. For request of permission, please complete the Permission Request Form and submit it to [email protected].