1. Faculty of Health Sciences, Kobe University School of Medicine, Kobe 654-0142, Japan
2. Department of General Internal Medicine, Kobe University School of Medicine, Kobe 650-0017, Japan
3. Division of Rehabilitation Medicine, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
4. Clinical Immunology, Kobe University Graduate School of Health Sciences, 7-10-2, Tomogaoka, Suma, Kobe 654-0142, Japan