I agree, that is very likely the issue. And the science here is not far enough along in human trials with his cancer type for them to find it on their own. One of the reasons PC is so deadly I believe is it is high ccr5 expression, as we see correlation with deadly cancers and ccr5 expression, though at this point it is just a correlation yet to be proven as an association in human trials. Sad, really, if what we think now turns out to be proven later.