Guo, Xiaoyong
He, Zhao
Shao, Shanshan
Fu, Yilin
Zheng, Dongmei
Liu, Lu
Gao, Ling
Guan, Liying
Zhao, Meng
Zhao, Jiajun
Article History
Received: 25 November 2019
Accepted: 18 February 2020
First Online: 25 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the ethics committee of Shandong Provincial Hospital affiliated to Shandong University (reference number was LCYJ: NO. 2019-002) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Written informed consents were obtained from each subject of epidemiological survey in Ningyang County before entering the survey. Data of health examination population were approved by the ethics committee of Shandong Provincial Hospital affiliated to Shandong University.