1 The Jockey Club School of Public Health and Primary CareFaculty of Medicine, Chinese University of Hong Kong, Hong Kong, China; Center for Health Education and Health Promotion, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China.
2 The Jockey Club School of Public Health and Primary CareFaculty of Medicine, Chinese University of Hong Kong, Hong Kong, China; Center for Health Education and Health Promotion, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China; School of Public Health, Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing, China; Department of Global Health, School of Public Health, Peking University, Beijing, China; School of Public Health, Fudan University, Shanghai, China.