1. Department of Medicine, Division of PulmonologyUlsan University Hospital, University of Ulsan College of MedicineUlsan South Korea
2. Department of Medicine, Division of PulmonologyChonnam National University HospitalGwangju South Korea
3. Department of Medicine, Division of PulmonologyChosun University HospitalGwangju South Korea
4. Department of Medicine, Division of PulmonologyDaegu Catholic University Medical CenterDaegu South Korea
5. Department of Medicine, Division of Pulmonology, St. Mary's HospitalCatholic UniversityIncheon South Korea
6. Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal MedicineHallym University Kangdong Sacred Heart HospitalSeoul South Korea
7. Department of Medicine, Division of PulmonologyAjou University School of MedicineSuwon South Korea
8. Department of Medicine, Division of PulmonologySoonchunhyang University Gumi HospitalGumi South Korea
9. Department of Medicine, Division of Pulmonology, CHA Bundang Medical CenterCHA UniversitySeongnam South Korea
10. Department of Medicine, Division of PulmonologyHanyang University Guri Hospital, Hanyang University College of MedicineGuri South Korea