Hidetaka Wakabayashi1, Keisuke Maeda2, Hiroshi Shamoto3. 1. Department of Rehabilitation Medicine, Yokohama City University Medical Center, Yokohama, Japan. 2. Department of Nutrition and Dysphagia Rehabilitation, Tamana Regional Health Medical Center, Tamana, Japan. 3. Department of Neurosurgery, Minamisoma Municipal General Hospital, Minamisoma, Japan.