1. Department of General Internal Medicine 3, Kawasaki Medical School General Medical Centre, 2-6-1 Nakasange, Kita-ku, Okayama 700-8505, Japan
2. Department of General Internal Medicine 1, Kawasaki Medical School General Medical Centre, 2-6-1 Nakasange, Kita-ku, Okayama 700-8505, Japan