linear, no threshold theory in the low dose region

[Bernard L Cohen <blc+@pitt.edu>]

Does anyone know of references that defend the linear, no-threshold 
theory for radiation-induced cancer in the low dose region? The defenses 
that I know about are essentially saying that we have been using that 
theory and are not convinced that there is good evidence for abandoning 
it. But that is not the same as saying we support the theory 
because..........I am looking for something like the latter.