A considerable controversy is brewing with respect to the validity of the linear no-threshold hypothesis for low doses and low dose rates of ionizing radiation. It basically stems from the recent reaffirmation of this hypothesis by both the International Commission on Radiological Protection (1) and the National Council on Radiation Protection and Measurements (2) and the official opposition to a linear low-dose response by the French Academy of Science (3). Morgan (4) recently discussed the ramifications of the issues as applied to the low-level bystander effect and adaptive response. Most recently, an exchange of letters to the Editor between Tubiana et al. (5) and Brenner et al. (6) has “stirred the LNT controversy pot”. We here take issue to the statement in the letter of Brenner et al. that “cancer risks at...

You do not currently have access to this content.