That is just anecdotal, and always will be until we do a proper double blind test controlled by the useless obstructionist FDA bureaucrats. In order to properly do the test you have to randomly select a pool, and randomly administer the drug to some and a placebo to others, knowing that they will likely die from withhold this treatment.
That is how you do a proper study /s/.
Just in case my sarcasm is missed, the idiocy of the FDA procedure is like this. Let us suppose that kids playing in traffic leads to increased mortality. We randomly select a pool of kids and subject one group to structured play in traffic and one group to structured play on an enclosed playground.
Of course we already know the outcome. It's physics and probability of large numbers.