1. Division of Pulmonary Medicine, Department of Medicine, Jichi Medical University, Japan
2. Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Japan
3. Department of Respiratory Medicine and Allergy, Tosei General Hospital, Japan
4. Department of Respiratory Medicine, Fukuoka University School of Medicine, Japan
5. Division of Pulmonary Medicine, Infection and Oncology, Nippon Medical School, Japan
6. Department of Respiratory Medicine, Toho University Omori Medical Center, Japan