Funding for this research was provided by:
the Natural Science Foundation of Guangdong Province (NO. 2014A030313357)
Received: 16 August 2017
Accepted: 15 January 2018
First Online: 14 March 2018
: Animal experiments were performed in accordance with the Republic of China animal protection law (Chapter III: Scientific Application of Animals) and approved by the Animal Care and Use Committee of Guangdong Pharmaceutical University.
: Not applicable.
: The authors declare that they have no competing interests.
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