CHICAGO (AP) -- There's a race going on among scientists to develop ways to diagnose and treat the concussion-related brain disease CTE.
The strongest evidence so far says it can only be diagnosed after death. But several former NFL stars have essentially been diagnosed based on an experimental test done at UCLA.
Former Buffalo Bills lineman Joe DeLamielleure is among them. He says the results are reassuring because they explain his depression, mood swings and insomnia.
Skeptics think CTE testing and diagnosing is too preliminary and raises ethical concerns.
Research on other players given UCLA's testing is due to be published this year. Scientists at other universities say they're making headway, too.