1. Department of Ophthalmology, Nihon University of Medicine, Tokyo, Japan
2. Department of Ophthalmology, Yokohama Minami Kyosai Hospital, Kanagawa, Japan
3. Yokosuka Chuo Eye Clinic, Kanagawa, Japan
4. Department of Ophthalmology, Heart Life Hospital, Okinawa, Japan
5. Department of Ophthalmology, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan
6. Shoji Eye Clinic, Chiba, Japan