1. Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, San Francisco, California, USA
2. National Research Center for Radiation Medicine, Kyiv, Ukraine
3. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
4. Robert Wood Johnson Medical School, Camden, New Jersey, USA
5. Department of Pathology and Cell Biology, and
6. Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York, USA
7. Burnasyan Federal Medical Biophysical Centre, Moscow, Russia