Explainer: What happened to Buffalo Bills safety Damar Hamlin?
Damar Hamlin makes an early impact in returning to field in Bills
Damar Hamlin honored at first Buffalo Bills game since his cardiac
NFL-Bills' Damar Hamlin plays in first game since January cardiac
Damar Hamlin: NFL Buffalo Bills' player in critical condition
Damar Hamlin's on-field collapse: The scene and the Bills
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What happened to Damar Hamlin, explained
Damar Hamlin collapsed during an NFL game. What happened? - Vox