TY JOUR TI International and National Approaches to the Conducting of Iodine Thyroid Blocking in the Accident of a Nuclear Reactor KW radiation safety KW emergency preparedness KW emergency medical response KW iodine thyroid blocking KW radiation accident KW dose criteria JO Medical Radiology and radiation safety AU Metlyaev, E.G. AU Bogdanova, L.S. AU Grachev, M.I. AU Salenko, Y.A. AU Frolov, G.P. AU Lyaginskaya, A.M. PY 2020 IS 65 PB Federal Medical Biological Agency of Russia