Received: 26 August 2019
Accepted: 21 February 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: This non-commercial study was approved by the Institutional Review Board Service and the Institutional Clinical Experiments Committee of Harbin Medical University. (Registration Number: SYXK(黑)2019-001).
: Not applicable.
: The authors declare that they have no competing interests.