1. Department of Ophthalmology, Miyata Eye Hospital, Miyakonojo, Japan
2. Department of Ophthalmology, School of Medicine, The University of Tokyo, Tokyo, Japan
3. Department of Neurology, School of Medicine, Kagoshima University, Kagoshima, Japan
4. Kitasato Institute for Life Sciences Research Organization for Infection Control Sciences, Kitasato University, Tokyo, Japan