1. Department of Clinical Studies Radiation Effects Research Foundation (RERF) Hiroshima Japan
2. Department of Statistics Radiation Effects Research Foundation (RERF) Hiroshima Japan
3. Department of Clinical Studies Radiation Effects Research Foundation (RERF) Nagasaki Japan
4. Department of Clinical Neuroscience and Therapeutics Hiroshima University Hiroshima Japan
5. Hiroshima Atomic‐bomb Casualty Council Hiroshima Japan
6. Japan Community Health care Organization Hoshigaoka Medical Center Osaka Japan
7. Department of Cardiovascular Medicine Hiroshima University Hiroshima Japan