1. The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
2. The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea 2Cornea Dystrophy Research Institute, Department of Ophthalmology, Severance Biomedical Science Institute, and Brain Korea 21 Plus Project f
3. Department of Oral Biology, Yonsei University College of Dentistry, Seoul, Korea
4. Research Laboratories, Dong-A Pharmaceutical Company, Kyunggi-do, Korea