Contents I. Introduction II. Summary of the Past Findings A. State of Irradiation and the Estimated Dose B. Clinical Observations 1. Symptoms and Signs--: 2. Skin 3. Haematological Observations 4. Spermatopoiesis 5. Liver Function 6. Other Studies Lesions: «0 IIT. 1964 Medical Survey A. Interval Histories B. Physical Examinations -- - C. Skin Lesions D. Ophthalmological Examinations E. Haematological Examinations -- ---) --- F. Chromosome Studies. -- ee oe G. Other Laboratory Studies H. Internal Exposure -.. --.- Summary oe Acknowledgements References -- = ee eens