1. Division of Pulmonary Medicine Department of Medicine Tokai University School of Medicine Kanagawa Japan
2. Department of Laboratory Medicine National Hospital Organization Tokyo National Hospital Tokyo Japan
3. Department of Pulmonary Medicine National Hospital Organization Tokyo National Hospital Tokyo Japan
4. Division of Diagnostic Pathology Saitama Cardiovascular and Respiratory Center Saitama Japan
5. Department of Respiratory Medicine Saitama Cardiovascular and Respiratory Center Saitama Japan
6. Division of Pulmonary Medicine Department of Medicine Keio University School of Medicine Tokyo Japan
7. Clinical Research Center for Allergy and Rheumatology National Hospital Organization Sagamihara Hospital Kanagawa Japan
8. Shino‐test Corporation Kanagawa Japan
9. Department of Laboratory Medicine Saga Medical School Saga Japan
10. Division of Medical Biochemistry Department of Biomolecular Sciences Saga Medical School Saga Japan