Published on in Vol 7 , No 4 (2019) :April

1 Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, CN
2 Department of Psychology, University of Alabama at Tuscaloosa, Tuscaloosa, AL, US
3 Department of Biostatistics, College of Public Health and Health Professions, Emerging Pathogen Institute, University of Florida, Gainesville, FL, US
4 Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, CN
5 Information and Network Center, Central South University, Changsha, CN
*these authors contributed equally