Funding for this research was provided by:
National Natural Science Foundation of China (71734003)
Article History
Received: 23 September 2019
Accepted: 27 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of Tongji Medical College, Huazhong University of Science and Technology (IORG No: IORG0003571). Informed consent was obtained from the participants enrolled in the household survey, and the residents were assured that their participation was voluntary and they could withdraw from the study at any time.
: Not applicable.
: The authors declare that they have no competing interests.