Funding for this research was provided by:
National Natural Science Foundation of China (31701739, 31671372)
National Key R&D Program of China (2018YFC0910400, 2017YFC0907500)
China Postdoctoral Foundation Grant (2017M623188)
Fundamental Research Fund of Xi’an Jiaotong University (1191329155)
Article History
Received: 6 December 2019
Accepted: 19 February 2020
First Online: 24 February 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interest.