Funding: the work supported financially by the Federal Medical Biological Agency of Russia as part of the research effort under the State Assignment.

Acknowledgements: the author thanks YaV Krivoshchapova, junior researcher, NF Savkova, senior laboratory assistant, for technical and laboratory support.

Compliance with ethical standards: the study was approved by the ethics committee of the Urals Research Center for Radiation Medicine (Minutes № 5 of December 20, 2022); all the cytogenetic study participants signed a voluntary informed consent for blood sampling and further analysis.