1. Department of Neurology, Saiseikai Utsunomiya Hospital
2. Department of Internal Medicine, Saiseikai Utsunomiya Hospital
3. Department of Ophthalmology, Saiseikai Utsunomiya Hospital
4. Department of Neurosurgery, Saiseikai Utsunomiya Hospital
5. Department of Neurology, School of Medicine, Tohoku University, Sendai and Department of Neurology, National Yonezawa Hospital