1. Department of Hematology, Oncology, Allergy and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
2. Department of Medical Technology, Okayama University Graduate School of Health Sciences, Okayama, Japan
3. Department of Respiratory Medicine, Kurashiki Central Hospital, Kurashiki, Japan
4. Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
5. Department of Allergy and Respiratory Medicine, Okayama University Hospital, Okayama, Japan