Buffalo Bills' Damar Hamlin critical after collapse on field - WHYY
When Damar Hamlin collapsed, the NFL deployed its emergency action plan - The Washington Post
Buffalo Bills' Damar Hamlin in 'critical condition' after collapse on field
Damar Hamlin's Cardiac Arrest: What We Know and Don't Know - The New York Times
If NFL truly cares about players, only course of action is to cancel game in wake of Damar Hamlin injury
Covering the possible causes and diagnoses of Damar Hamlin's injury - Poynter
Damar Hamlin cardiac arrest: Everything you need to know about collapse of Bills player.
Damar Hamlin: Buffalo Bills player in critical condition but showing 'signs of improvement' as support offered to Tee Higgins, NFL News
Damar Hamlin update, Bills-Patriots schedule, NFL Week 18
Damar Hamlin injury: Bills' Safety makes first public comment since cardiac arrest