1. Department of Environmental MedicineKochi Medical School, University of FukuiJapan
2. Division of Environmental Health, Department of International and Social MedicineSchool of Medicine, University of FukuiJapan
3. Department of Diagnostic RadiologyRadiooncology and Nuclear Medicine, KnappschaftskrankenhausGermany
4. Department of RadiologyFinnish Institute of Occupational HealthFinland
5. Institute and Outpatient Clinic for Occupational Medicine, Aachen University of TechnologyGermany
6. Department of RadiologyDokkyo Medical UniversityJapan
7. West Virginia University School of MedicineUSA
8. Department of RadiologyHelsinki University School of MedicineFinland
9. Service de Médicine du Travail et Pathologie ProfessionnelleFrance
10. Department of RadiologyHospital Erasme‐Universite Libre de BruxellesBelgium
11. The Clinic for Thoracic Diseases, Radiology and Nuclear MedicineGermany
12. Radiology DepartmentLlandough HospitalUK
13. Rosai Hospital for SilicosisJapan
14. Department of Radiology, NHO‐Kinki Chuo Chest Medical CenterJapan
15. Department of RadiologyMedical College of Virginia Hospitals, School of Medicine, Virginia Commonwealth UniversityUSA
16. Department of RadiologySt. Marianna University School of MedicineJapan
17. Sapporo Railway HospitalJapan
18. University of FukuiJapan
19. Radiation Effects Research FoundationJapan