1. Department of Ophthalmology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
2. Department of Ophthalmology, Pusan National University School of Medicine, Yangsan, Korea.
3. Department of Ophthalmology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
4. Department of Ophthalmology, Gyeongsang National University School of Medicine, Jinju, Korea.
5. Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Korea.
6. Institute of Environmental and Occupational Medicine, Department of Occupational and Environmental Medicine, Inje University College of Medicine, Busan, Korea.