What happened to NFL player Damar Hamlin, who collapsed on the field after suffering cardiac arrest
Damar Hamlin's Cardiac Arrest: What We Know and Don't Know - The New York Times
Damar Hamlin's Charity Receives $3M in Donations After His Collapse –
EXPLAINER: What happened to Damar Hamlin?
Damar Hamlin's Cardiac Arrest: What We Know and Don't Know - The New York Times
How an NFL hit like Damar Hamlin's can stop a heart - Gothamist
EXPLAINER: What happened to Buffalo Bills safety Damar Hamlin?
Buffalo Bills player Damar Hamlin is in critical condition after collapsing in a game
Commotio cordis: Why NFLer Damar Hamlin's heart stopped
EXPLAINER: What happened to Damar Hamlin?
Damar Hamlin: Buffalo Bills safety showing 'remarkable improvement,' doctors say