Funding for this research was provided by:
Natural Science Foundation of China (61872300)
Natural Science Foundation of China (61741214)
Fundamental Research Funds for the Central Universities (XDJK2019B024)
Natural Science Foundation Project of Chongqing, Chongqing Science and Technology Commission (cstc2018jcyjAX0228)
Article History
Received: 27 August 2019
Accepted: 27 September 2019
First Online: 24 December 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.