Funding for this research was provided by:
National Natural Science Foundation of China (81601653)
Text and Data Mining valid from 2018-12-01
Received: 9 October 2018
Accepted: 19 December 2018
First Online: 29 December 2018
Ethics approval and consent to participate
: The experiments complied with the national guidelines and were conducted under the permissions.
: Not applicable.
: The authors declare that they have no competing interests.
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