I was very interested to see the latest analysis by Preston et al. (1) of mortality in the Life Span Study (LSS) of Japanese atomic bomb survivors. This paper makes an important contribution to the quantification of late radiation risks, for both cancer and noncancer diseases. However, I would like to correct a point concerning the citation of the UK National Registry for Radiation Workers (2).

In comparing the LSS findings for noncancer diseases with those from other studies, Preston et al. refer in section 5.2 of their paper (1) to a significant association between mortality from circulatory disease and radiation doses in the three-country study of nuclear workers (3), and then state that “similar effects have also been seen in more recent analyses of UK nuclear workers and Chernobyl clean-up workers”. However, the cited UK...

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