1. State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, Guangdong, China
2. Harvard Medical School, Boston, Massachusetts
3. Health Promotion Center for Primary and Secondary Schools of Guangzhou Municipality, Guangzhou, Guangdong, China
4. Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Ji-nan University, Shenzhen, China
5. Research Center for Public Health, Tsinghua University, Beijing, China
6. Melbourne Sexual Health Centre, Alfred Health, Melbourne, Victoria, Australia
7. Central Clinical School, Faculty of Medicine, Nursing, and Health Sciences, Monash University, Melbourne, Victoria, Australia
8. School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia
9. Centre for Eye Research Australia, Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, Australia