radiation epidemiology cohort NRER The National Radiation and Epidemiology Registry (NRER) at the Medical Radiological Research Center in Obninsk, Russia, maintains epidemiological data on populations exposed to ionising radiation including Chernobyl cleanup workers, residents of contaminated territories and other radiation-exposed groups in Russia. It supports long-term epidemiological follow-up studies on cancer and non-cancer health effects and provides a resource for collaborative research with international partners. Located at A. Tsyb MRRC. Paul Schofield