1. Radiation Epidemiology Branch, National Cancer Institute, Bethesda, Maryland 20892-9778
2. Office of Air and Radiation, Environmental Protection Agency, Washington, DC 20004
3. Departments of Statistics
4. Radiation Safety Research Center, Nuclear Technology Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Tokyo 201-8511, Japan
5. Centre for Occupational and Environmental Health, The University of Manchester, Manchester, M13 9PL, United Kingdom
6. Departments of Epidemiology, Radiation Effects Research Foundation, Hiroshima 732-0815, Japan