1. Department of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Japan
2. Research Institute for Diseases of Old Ages, Juntendo University Faculty of Medicine and Graduate School of Medicine, Japan
3. Department of Human Pathology, Juntendo University Faculty of Medicine and Graduate School of Medicine, Japan
4. Department of Pathology, Labour Health and Welfare Organization Kanto Rosai Hospital, Japan.