Damar Hamlin: Buffalo Bills player in critical condition in hospital after cardiac arrest on field during game against Cincinnati Bengals, NFL News
Pro football's troubled history of on-field medical emergencies
When Damar Hamlin collapsed, the NFL deployed its emergency action plan - The Washington Post
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Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest
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If NFL truly cares about players, only course of action is to cancel game in wake of Damar Hamlin injury
Buffalo Bills player is in critical condition after collapsing in game : NPR
Bills safety Hamlin set to appear in first regular-season game since cardiac arrest, Football