Funding for this research was provided by:
Beijing Municipal Science (Beijing Municipal Science and Technology Commission Fund)
Received: 11 November 2019
Accepted: 15 January 2020
First Online: 28 January 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of 302 Hospital of PLA (People’s Liberation Army). The Ethics number is 2017111D.
: Not Applicable.
: The authors declare that they have no competing interests.