1. From the Department of Ophthalmology, Tohoku University School of Medicine, Miyagi, Japan; the
2. Department of Neuroanatomy, Field of Neurology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan; and the
3. Department of Oral Physiology, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido, Japan.