Maybe I'll start, and then if Dr. Taylor has comments he can add them.
To my understanding, the science and the clinical trials are not yet as clear-cut as you're suggesting. As you know, that is really one of the main purposes of the clinical trial that's currently under way. That clinical trial will end I understand in the next year or year and a half. We will see from the results of that clinical trial whether the evidence is actually there. That's the whole purpose of the trial.