Ryosuke Sato1,2,3. 1. Department of Internal Medicine, Sato Clinic, Hamamatsu 433-8127, Japan. 2. Department of Laboratory Medicine, Hamamatsu University School of Medicine, Hamamatsu 431-3192, Japan. 3. Seirei Center for Health Promotion and Preventive Medicine, Hamamatsu 430-0906, Japan.