1. Department of Ophthalmology, The Second People’s Hospital of Jinan, No. 148 Jingyi Road, Jinan, Shandong 250001, China
2. Academy of Preventive Medicine, Shandong University, Jinan, China
3. The Department for Chronic and Noncommunicable Disease Control and Prevention, Shandong Center for Disease Control and Prevention, Jinan, Shandong, China
4. Department of Ophthalmology, Qilu Hospital Affiliated Shandong University, Jinan, Shandong 250012, China