Dong, Kai Feng
Huo, Meng Qi
Sun, Heng Ya
Li, Tian Ke
Li, Dan
Funding for this research was provided by:
Project of medical science research of Hebei Health Committee (20170486)
Article History
Received: 7 January 2020
Accepted: 4 June 2020
First Online: 7 July 2020
Competing interests
: The authors declare no competing interests.