@article{Koterov2019strength, author={Koterov, A.N. and Ushenkova, L.N. and Zubenkova, E.S. and Vaynson, A.A. and Kalinina, M.V. and Biryukov, A.P.}, title={Strength of Association. Report 1. Graduations of Relative Risk}, journal={Medical Radiology and radiation safety}, publisher={Federal Medical Biological Agency of Russia}, year={2019}, pages={5-17}, volume={64}, issue={4}, }