1. Department of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Japan
2. Department of Pathology, Yokohama City University Graduate School of Medicine, Japan
3. Department of Pathology, Kanagawa Cardiovascular and Respiratory Center, Japan
4. Department of Radiology, Kanagawa Cardiovascular and Respiratory Center, Japan
5. Division of Respiratory Medicine, Department of Internal Medicine, St Marianna University School of Medicine, Japan