That's bad writing from the blog author who's trying to paraphrase this: [...] the authors estimated that the excess risk of childhood leukaemia was 12% per mi

That's bad writing from the blog author who's trying to paraphrase this: [...] the authors estimated that the excess risk of childhood leukaemia was 12% per millisievert of cumulative red bone marrow dose from background gamma radiation (Kendall et al, 2012). ... where (Kendall et al, 2012) refers to http://www.nature.com/leu/journal/v27/n1/full/leu2012151a.html http://www.nature.com/leu/journal/v27/n1/full/leu2012151a.ht....