Explainer: What happened to Buffalo Bills safety Damar Hamlin?
NFL players get education on Damar Hamlin's cardiac arrest - Los Angeles Times
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Bills safety Damar Hamlin heads home more than a week after cardiac arrest
What happened to Damar Hamlin? – Macomb Daily
Bills' Damar Hamlin in critical condition after collapse on field
Buffalo Bills' Damar Hamlin in critical condition after cardiac arrest on field, NFL