1. Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK;
2. Medical School Southeast University, Nanjing, China;
3. School of Nursing, University of Hong Kong, Hong Kong, China;
4. Clinical Innovation & Research Centre (CIRC), Shenzhen Hospital, Southern Medical University, Shenzhen, China;
5. The George Institute for Global Health, University of Oxford, Oxford, UK