Wang, Liqun
Li, Jiangping
Du, Yong
Sun, Ting
Na, Li
Wang, Zhizhong
Funding for this research was provided by:
the Research and Development Plan of the 13th five-year plan of Ningxia autonomous region (2016BZ02)
Article History
Received: 18 December 2018
Accepted: 12 March 2020
First Online: 20 March 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the General Hospital of Ningxia Medical University (No. 2017–200). All the participants provided written informed consent before completing the survey and health examination.
: Not applicable.
: The authors declare that they have no competing interests.