1. Department of Ophthalmology, Soonchunhyang University, College of Medicine, Bucheon 420-767, Korea.
2. BioMarin Pharmaceutical, Novato, CA 94901.
3. Department of Microbiology, University of Ulsan, College of Medicine, Seoul 138-736, Korea.
4. Department of Endocrinology and Metabolism, Kyung Hee University, School of Medicine, Seoul 130-872, Korea.
5. Department of Ophthalmology, Kyung Hee University, School of Medicine, Seoul 138-872, Korea.