Damar Hamlin: Buffalo Bills player in critical condition but showing 'signs of improvement' as support offered to Tee Higgins, NFL News
What Happened to Damar Hamlin? What We Know After Bills Player Collapses, Suffers Cardiac Arrest On Field – NBC Chicago
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Buffalo Bills star Damar Hamlin's on-field collapse puts spotlight on cardiac arrest in young people - ABC News
Opinion Damar Hamlin and What CPR Is For - The New York Times