1 School of Public Health, Sun Yat-Sen University, Guangzhou, China.
2 Department of General Practice, The Second Hospital of Hebei Medical University, Shijiazhuang, China.
3 Usher Institute, Deanery of Molecular, Genetic and Population Health Sciences, The University of Edinburgh, Scotland, United Kingdom.
4 State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China.
5 Centre for Health Education and Health Promotion, The Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.
6 Editor-in-Chief, Hong Kong Medical Journal.
7 School of Public Health, Fudan University, Shanghai, China.
8 The Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
9 School of Public Health, Peking University, Beijing, China.