I think they cherry picked research that supported policies and procedures in place at the time. This is what they did up until the bitter end.
The ones produced by independent organizations, not interest groups.
It provided little assistance to many players with long term health concerns until the most recent cba this year.
That's how research works when an interested party, i.e., the NFL, sponsors it. They come up with conflicting results that call into question the valid results reached by independent medical researchers or they simply ignore the research their own
For example:
Head Injuries News - The New York Times
