1. Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
2. Division of Biostatistics, Department of R&D Management, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
3. Department of Ophthalmology and Inha Vision Science Laboratory, Inha University School of Medicine, Incheon, Korea
4. Department of Otorhinolaryngology, Inha University School of Medicine, Incheon, Korea
5. Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Korea