Damar Hamlin: American football player 'had to be resuscitated' after on-field collapse, US News
Damar Hamlin collapse spurs new wave of vaccine misinformation
What is commotio cordis? It could have caused Damar Hamlin to collapse : NPR
Very rare - the perfect storm': Cardiologist on NFL star Damar Hamlin's on-field collapse, US News
Damar Hamlin's Cardiac Arrest: What We Know and Don't Know - The New York Times
Damar Hamlin will play football again, NFL players union doctor says
What is commotio cordis? It could have caused Damar Hamlin to collapse : NPR
Monday Night Football postponed after Bills' Damar Hamlin collapses, requires CPR on field
EXPLAINER: What happened to Damar Hamlin? – KGET 17
Excerpts from news conference with doctors on Bills' Damar Hamlin
Hamlin's Collapse Spurs Speculation Over Rare Condition Caused by Chest Impact - Bloomberg
Damar Hamlin Update: Cardiologist Explains Bills Player Collapse – NBC New York
Cardiac arrest causes: What led to Buffalo Bills' Damar Hamlin's collapse?