1. Department of Ophthalmology, Tokyo Dental College Ichikawa General Hospital, Chiba, Japan
2. Department of Ophthalmology, Okayama University, Okayama, Japan
3. Department of Ophthalmology, Shinto General Hospital, Kumamoto, Japan
4. Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
5. Department of Ophthalmology, Kanazawa University, Ishikawa, Japan