Bills safety Damar Hamlin suffered cardiac arrest, heartbeat restored, on field
Bills' Damar Hamlin in critical condition after suffering cardiac arrest on field; game postponed - Chicago Sun-Times
Damar Hamlin makes an early impact in returning to field in Bills' preseason game against Colts
Damar Hamlin makes return to the NFL field Sunday
Damar Hamlin collapsed during an NFL game. What happened? - Vox
Buffalo Bills' Damar Hamlin critical after collapse on field - WHYY
What happened to Damar Hamlin, explained
Buffalo Bills' Damar Hamlin Is Discharged After Harrowing Injury - Bloomberg
Covering the possible causes and diagnoses of Damar Hamlin's injury - Poynter