1. Department of Ophthalmology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
2. Medical College, University of South China, Hengyang, Hunan 421001, P.R. China
3. Department of Ophthalmology, The First Affiliated Hospital of Nanchang University, Jiangxi Province Clinical Ophthalmology Institute, Nanchang, Jiangxi 330006, P.R. China
4. Department of Cardiology, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China