Here's what happened after Damar Hamlin collapsed during the Bills-Bengals game : NPR
For the Bills' Damar Hamlin, this NFL season was an opportunity to 'cherish'
How will Damar Hamlin incident affect teammates? - Los Angeles Times
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Damar Hamlin makes an early impact in returning to field in Bills' preseason game against Colts
Damar Hamlin's Collapse and the Mental-Health Concerns Facing the NFL - WSJ