Funding for this research was provided by:
Key R&D Program of Shaanxi (S2018-YF-ZDSF-0240)
Natural Science Foundation of Shaanxi Province (2019JM-021)
Received: 3 September 2020
Accepted: 14 January 2021
First Online: 28 January 2021
Ethics approval and consent to participate
: The study design was approved by the Ethics Committee of Xi'an Jiaotong University complying with Declaration of Helsinki and all participants have signed the written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.