TY JOUR TI Transcriptional Activity of TP53 and MDM2 in Chronically Exposed People at Later Time Points KW chronic irradiation KW gene expression KW TP53 KW MDM2 KW low doses KW radiobiological response JO Medical Radiology and radiation safety AU Nikiforov, V.S. AU Akleev, A.V. PY 2018 IS 63 PB Federal Medical Biological Agency of Russia