wow 3 yrs is a long time to wait if you think it might help someone you love.
U of M uses a lot of these experimental drugs in brain injuries. Sometimes they work. I’d LOVE to have our grandson try this. He lost oxygen during an anaphylactic shock after receiving an allergy shot a yr ago. This might help him recover some of the brain function.
Your grandson is lucky to have a Grandmother like you, because you convert your caring feelings into helpful actions.