1. Department of Ophthalmology, University of Tokyo Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
2. Department of Ophthalmology and Micro-Technology, Yokohama City University School of Medicine, Minami-ku, Yokohama, Kanagawa, Japan
3. Hirono Satellite Laboratories, Isotope Science Center, the University of Tokyo, Hirono-mati, Futaba-gun, Fukushima, Japan
4. Department of Ophthalmology, Jichi Medical University, Shimotsuke-City, Tochigi, Japan
5. Department of Ophthalmology, Jichi Medical University Saitama Medical Center, Omiya-ku, Saitama, Japan