TY JOUR TI Risk Assessment and Dose Thresholds at the Plutonium Pnevmosclerosis KW plutonium pneumosclerosis KW risk KW dose thresholds KW Weibull distribution KW standard uncertainty KW Mayak PA JO Medical Radiology and radiation safety AU Osovets, S.V. AU Azizova, T.V. AU Grigor'eva, E.S. PY 2018 IS 63 PB Federal Medical Biological Agency of Russia