Funding for this research was provided by:
National Natural Science Foundation of China (No. 81873674)
Xi’an Fourth Hospital Research Incubation Fund (LH-6)
Received: 16 February 2020
Accepted: 1 June 2020
First Online: 18 June 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Ethics Committee of Ethics Committee of Tangdu Hospital of the Fourth Military Medical University, Xi’an, China (TDLL 201506–05). Written informed consent was obtained from all participants prior to study enrolment.
: Not applicable.
: The authors declare that there is no competing interest regarding the publication of this article.