radiation epidemiology cohort LATVIAN STATE REGISTER OF PERSONS EXPOSED TO RADIATION DUE TO CHERNOBYL https://www.rsu.lv/en/node/597 Paul Schofield The Latvian State Register of Persons Exposed to Radiation due to the Chernobyl Nuclear Power Plant Accident is maintained by the Centre of Occupational and Radiation Medicine (Pauls Stradins Clinical University Hospital) and documents Latvian Chernobyl cleanup workers and affected residents, supporting long-term health monitoring and epidemiological research. Data can only be processed without personal sensitive information and cannot be sent outside Latvia; joint research collaboration is possible subject to ethics committee approval. Research is carried out in collaboration with the Institute of Occupational Safety and Environmental Health at Riga Stradins University. Located at The Centre of Occupational and Radiation Medicine (Pauls Stradins Clinical University Hospital).