Funding for this research was provided by:
the China Medical Board (0082827601130)
the Science and Technology Department of Sichuan Province (2013FZ0088)
Text and Data Mining valid from 2019-04-24
Received: 17 April 2018
Accepted: 10 April 2019
First Online: 24 April 2019
Consent for publication
: Not applicable.
: The authors declare that they have no competing interests.
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