1. Department of Internal Medicine, Fujita Health University School of Medicine, 1–98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi 470–11, Japan
2. Department of Clinical Chemistry, Fujita Health University School of Health Sciences, Toyoake, Aichi, Japan
3. Third Division, Department of Internal Medicine, Osaka Medical College, Takatsuki, Japan