Funding for this research was provided by:
National Natural Science Foundation of China (81471209, 81000504, 81641055)
Natural Science Foundation of Beijing Municipality (7132112)
Distinguished Professor of Cheung Kong Scholars Program (T2014251)
Received: 21 June 2017
Accepted: 26 January 2018
First Online: 9 February 2018
: All experimental procedures and animal care were approved by Xuanwu Hospital of Capital Medical University Ethics Committee and were conducted in accordance with the guidelines of the National Institutes of Health on the care and use of animals.
: Not applicable
: The authors declare that they have no competing interests.
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