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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (41761094)
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Article History
Received: 8 September 2018
Accepted: 13 February 2019
First Online: 26 February 2019
Compliance with ethical standards
:
: Xiao-Zhang Yu has received the grants from the National Natural Science Foundation of China. The other authors, Yu-Juan Lin and Qing Zhang, declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
