It's almost un-American to say that you want to change football.

Dave Duerson had classic pathology of CTE and no evidence of any other disease.

I started out as a neurologist. I then trained in neuropathology and was focused on neurodegeneration. So, for years, I studied Alzheimer's, aging, Parkinson's, that kind of thing.

If football is your passion in life and you would rather play football for 20 years and have a shortened life span, that's your choice.

We're hoping that there is large-scale recognition that CTE is a risk when playing football.