1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea
2. Department of Laboratory Medicine and Genetics, Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea
3. Department of Pathology, Samsung Medical CenterSungkyunkwan University School of Medicine Seoul South Korea
4. Division of Pulmonary Medicine and Allergy, Department of Internal MedicineHanyang University College of Medicine Seoul South Korea