2 National School of Development, Peking University, Beijing, People's Republic of China.
3 Hangzhou Vocational and Technical College, Hangzhou, People's Republic of China.
4 School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.
5 Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, People's Republic of China.
6 Center for Disease Control and Prevention of Jinyun County, Jinyun, Zhejiang, People's Republic of China.
7 Zhejiang Provincial Center for Disease Control and Prevention of Hangzhou, Hangzhou, People's Republic of China.
8 Department of Ophthalmology, Central Hospital of Jinyun County, Jinyun, Zhejiang, People's Republic of China.
9 Center for Preventive Ophthalmology and Biostatistics, Department of Ophthalmology, Perelman School of Medicine, University of Pennsylvania, 3711 Market Street, Suite 801, Philadelphia, PA, 19104, USA. gsying@pennmedicine.upenn.edu.
10 Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, People's Republic of China. 1189002@zju.edu.cn.