Ou, Jinghua
Guan, Defeng
Yang, Yongxiu
Funding for this research was provided by:
National Natural Science Foundation of China (81201549)
Gansu Provincial People’s Hospital fund (18GSSY5-15)
Article History
Received: 17 February 2019
Accepted: 27 May 2019
First Online: 10 June 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.