1. Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA;
2. Institute of Endocrinology and Metabolism, Kyiv, Ukraine;
3. Department of Medicine, The Thyroid Clinic, College of Physicians and Surgeons, Columbia University, New York, New York, USA;
4. Clinical Endocrinology Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA;
5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA;
6. Scientific Center for Radiation Medicine, Academy of Medical Science, Kyiv, Ukraine