Bai, Chen
Liu, Tiegang
Xu, Jingnan
Ma, Xueyan
Huang, Ling
Liu, Shaoyang
Yu, He
Chen, Jianxin
Gu, Xiaohong
Funding for this research was provided by:
Beijing Nova Program (Z181100006218083)
Natural Science Foundation of Beijing Municipality (7172131)
Article History
Received: 20 August 2019
Accepted: 17 January 2020
First Online: 3 February 2020
Competing interests
: The authors declare no competing interests.