Ayako Tsunemitsu¹, Hikaru Sato², *Harumi Gomi³, Naoko Iwasaki⁴, Mio Ebato⁵ (1. Internal Medicine, TAKATSUKI General Hospital, 2. Department of Neurology, Kameda Medical Center, 3. Office of Medical Education, Center for Infectious Diseases, School of Medicine, International University of health and Welfare , 4. Institute of Geriatrics, Tokyo Women’s Medical University , 5. Divison of Cardiovascular Medicine, Showa University Fujigaoka Hospital)