I almost put this in the AB thread as that is where all of the CTE talk is, but decided this may have broader interest for folks. Long read, but interesting:
https://www.stripes.com/sports/sports-perspectives/the-selling-of-cte-how-the-concussion-doctor-has-built-a-career-on-distorted-science-1.615744
https://www.stripes.com/sports/sports-perspectives/the-selling-of-cte-how-the-concussion-doctor-has-built-a-career-on-distorted-science-1.615744