Buffalo Bills star Damar Hamlin's on-field collapse puts spotlight on cardiac arrest in young people - Good Morning America
Damar Hamlin collapsed during an NFL game. What happened? - Vox
Damar Hamlin's cardiac arrest during 'Monday Night Football' could be commotio cordis or a more common condition – a heart doctor answers 4 questions
The blow Damar Hamlin suffered: These strong impacts cause arrhythmias that can be lethal
Explainer: What Happened to Buffalo Bills Player Damar Hamlin?, Chicago News
NFL: Damar Hamlin cleared to play again after cardiac arrest, American Football News
Bills player Damar Hamlin in critical condition after cardiac arrest on the field, Sports
Damar Hamlin: What Could Have Led to His Cardiac Arrest and His Chances of Survival (Exclusive)
Damar Hamlin's condition shows improvement, Buffalo Bills say - BBC News