1. School of Public Health, The University of Hong Kong, Hong Kong, China
2. School of Health and Population Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
3. Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
4. School of Nursing, The Hong Kong Polytechnic University, Hong Kong, China
5. Division of Environment, The Hong Kong University of Science and Technology, Hong Kong, China
6. Department of Health, the Government of Hong Kong, Hong Kong, China