Published on in Vol 22, No 3 (2020): March
1 Department of Medical Statistics, School of Public Health, Sun Yat-sen University, Guangzhou, China
2 Health Information Research Center, Guangdong Key Laboratory of Medicine, School of Public Health, Sun Yat-sen University, Guangzhou, China
3 Sun Yat-sen Global Health Institute, Institute of State Governance, Sun Yat-sen University, Guangzhou, China
4 School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
5 National Institute on Drug Dependence, Peking University, Beijing, China
*these authors contributed equally