Putting aside the anecdotal nature of your comment, it raises the question of whether, because McKenna was "worried" about a causal relation between his brain c

Putting aside the anecdotal nature of your comment, it raises the question of whether, because McKenna was "worried" about a causal relation between his brain cancer and prior cannabis use, he ceased smoking post-diagnosis. If so, that would certainly complicate what I'm assuming you're implying, that McKenna's case runs counter to the [edit: findings communicated in the] HuffPo article... Edit: Also, it's significant that the treatment in the study was a "combination of radiation and two different marijuana compounds", not simply a correlation to historical cannabis use.