Funding for this research was provided by:
National Natural Science Foundation of China (81773297)
Received: 7 December 2017
Accepted: 25 November 2018
First Online: 13 December 2018
Ethics approval and consent to participate
: Before study commencement, ethical approval was granted by the research ethics committee of Jiangnan University. Informed written consent was obtained from the participants prior to starting the study.
: Not applicable.
: The authors declare that they have no competing interests.
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