1. JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China
2. Shenzhen Research Institute of Chinese University of Hong Kong, Shenzhen, China
3. Department of Applied Mathematics, Hong Kong Polytechnic University, Hong Kong, China
4. Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, China
5. School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China
6. Mathematics and Science College, Shanghai Normal University, Shanghai, China
7. School of Nursing, Hong Kong Polytechnic University, Hong Kong, China
8. Department of Mathematics, Huaiyin Normal University, Huai'an, China