1. Department of Internal Medicine, Division of Respiratory Medicine, Kanagawa Cardiovascular and Respiratory Center, Japan
2. Department of Respiratory Medicine, Tokyo Jikei University Hospital, Japan
3. Department of Pathobiology, Yokohama City University Graduate School of Medicine, Japan
4. Department of Radiology, Kanagawa Cardiovascular and Respiratory Center, Japan
5. Department of Pathology, Japanese Red Cross Medical Center, Japan