Funding for this research was provided by:
The National Science Foundation of China (31671857, 31371773)
Text and Data Mining valid from 2019-05-01
Received: 7 March 2019
Accepted: 23 April 2019
First Online: 1 May 2019
: All animal procedures in this study were approved by the Biomedical Engineering Institute of Academy of Medical Sciences of China in accordance with the guidelines about Animal Care of the Medical Sciences of China.
: Not applicable.
: The authors declare that they have no competing interests.
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