TY JOUR TI Problems of Identifying Dose – Effect Dependence for Radiation Carcinogenesis KW radiation epidemiology KW dose KW radiation risk KW cohort KW morbidity KW mortality KW solid cancer KW leukemia KW statistical power JO Medical Radiology and radiation safety AU Demin, V.F. AU Biryukov, A.P. AU Zabelin, M.V. AU Solov'ev, V.Y. PY 2018 IS 63 PB Federal Medical Biological Agency of Russia