1. Department of Epidemiology Radiation Effects Research Foundation Hiroshima Japan
2. Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics National Cancer Institute, National Institutes of Health Rockville MD USA
3. Department of Mathematics and Statistics University of Wyoming Laramie WY USA
4. Department of Preventive Medicine Korea University College of Medicine Seoul South Korea
5. IRCCS CRO National Cancer Institute Aviano Italy
6. Screening Group, Section of Early Detection and Prevention, International Agency for Research on Cancer Lyon France