1. Department of Respiratory Medicine and Clinical Immunology National Hospital Organization Utsunomiya Hospital Tochigi Japan
2. Division of Pulmonary Medicine, Department of Medicine Keio University School of Medicine Tokyo Japan
3. Department of Diagnostic and Generalist Medicine Dokkyo Medical University Tochigi Japan
4. Department of Respiratory Medicine and Clinical Immunology Dokkyo Medical University Saitama Medical Center Saitama Japan