Cardiac arrest causes: What led to Buffalo Bills' Damar Hamlin's collapse?
Buffalo Bills' Damar Hamlin in critical condition after cardiac arrest on field, NFL
Bills' Hamlin in critical condition after suffering cardiac arrest during game against Bengals
How NFL Player Damar Hamlin Tackled the Odds: Health Experts Weigh In
Bills GM: Damar Hamlin cleared to play after cardiac arrest - WHYY
Damar Hamlin Returns to the Field in First Game Since Cardiac Arrest – The Hollywood Reporter
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest
Damar Hamlin returns to action nine months after cardiac arrest, featuring in Bills vs Dolphins
Damar Hamlin is medically cleared to resume playing 4 months after cardiac arrest, Buffalo Bills GM says – Orlando Sentinel
Damar Hamlin cleared to play 4 months after cardiac arrest