Guardian: You reported the view that radiation risks are exaggerated, but left out vital information on radiation protection (Radiation health threat overstated – Oxford professor, 11 January). The article relied upon and extensively cited a retired professor of particle physics, Wade Allison, who is neither a radiation biologist nor an epidemiologist, and is not in my view an expert in radiation risks. Indeed, the other three scientists quoted in the article pointedly refrained from supporting …