FILE - In this Feb. 4, 2016 file photo, NFL Senior Vice President of Health and Safety Policy Jeff Miller speaks during an NFL health and safety news conference in San Francisco. The NFL's top medical experts are asking college football physicians and trainers to help make the game safer. Dr. Allen Sills and Jeff Miller, the NFL's executive vice president for health and safety initiatives, spent Monday June 17 2019 and Tuesday, June 18, 2019 in Indianapolis sharing data about their findings on the prevention and treatment of injuries. (AP Photo/David J. Phillip, File)
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