Funding for this research was provided by:
Natural Science Foundation of the Shanxi Science and Technology Department (201701D121156)
Received: 23 March 2020
Accepted: 30 July 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: This study was approved by the Human Research Ethical Committee of the Shanxi provincial people’s hospital. Written informed consent was obtained from all individual participants included in the study.
: This manuscript has been approved by all authors for submission. The results from this study were neither published previously, nor are they under consideration for publication elsewhere.
: The authors declare that they have no competing interests. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.