1. Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland.
2. Republican Center for Radiation Medicine and Human Ecology, Gomel, Belarus.
3. The Thyroid Center, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York.
4. Department of Epidemiology and Biostatistics, School of Medicine, University of California San Francisco, San Francisco, California.
5. Department of Anthropoecology and Epidemiology, International Sakharov Environmental University, Minsk, Belarus.