1. Department of Pediatrics, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
2. Department of Allergy and Respiratory Medicine, Okayama University Hospital, Okayama 700-8558, Japan
3. Department of General Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
4. Department of Respiratory Medicine, National Hospital Organization Minami-Okayama Medical Center, Okayama 701-1192, Japan
5. Department of Allergy and Respiratory Medicine, National Hospital Organization Minami-Okayama Medical Center, Okayama 701-0304, Japan
6. Department of Gastroenterology, Okayama City Hospital, Okayama 700-0962, Japan
7. Department of Internal Medicine, Fukuyama City Hospital, Fukuyama 721-0971, Japan
8. Department of Infectious Disease, Okayama City Hospital, Okayama 700-0962, Japan
9. Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama 700-8558, Japan
10. Department of Emergency, Critical Care and Disaster Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
11. Department of General Thoracic Surgery and Breast and Endocrine Surgery, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan
12. Department of Hematology, Oncology and Respiratory Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8558, Japan