Zhang, Xue
Deng, Qifei
He, Zhini
Li, Jie
Ma, Xiaoju
Zhang, Zhaorui
Wu, Dehua
Xing, Xiumei
Peng, Jing
Guo, Hongyu
Huang, Ming
Chen, Liping
Dang, Shanfeng
Zhu, Yanqun
Zhang, Zhengbao
Yang, Boyi
Wang, Hailan
Chen, Wen
Xiao, Yongmei
Funding for this research was provided by:
key Program of the National Natural Science Foundation of China (81430079)
regular National Natural Science Foundation of China (81372962, 81402658, 81273099, 81602877)
National “Twelfth Five-Year Plan” for Science & Technology (2014BAI12B01)
Guangdong Province Doctor Staring Program Grant (2016A030310163)
Young Teachers Training Program of Sun Yat-sen University (18ykpy14)
Article History
Received: 25 October 2019
Accepted: 9 March 2020
First Online: 23 March 2020
Ethics approval and consent to participate
: The present study had received ethical approval from the Ethical Review Committee at School of Public Health, Sun Yat-Sen University. Participation of our study subjects did not occur until after a written informed consent was obtained.
: Not applicable.
: The authors declare that they have no competing interests.