1. Department of Ophthalmology, Chonbuk National University, Jeollabuk-do 561-756, Republic of Korea (past position)
2. Department of Ophthalmology, Affiliated Hospital of Taishan Medical University, Taian 271000, China
3. Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, Taishan Medical University, Taian 271000, China