Damar Hamlin collapsed during an NFL game. What happened? - Vox
A timeline of the NFL's response after Damar Hamlin collapsed
How the Bills and Bengals led the way in the hour after Hamlin collapsed - ESPN
Bills' Hamlin in critical condition after collapse on field - The San Diego Union-Tribune
Buffalo Bills' Damar Hamlin in critical condition after collapse on field
Bengals' owner releases statement on Damar Hamlin, thankful for 'love and compassion shown by all'
Damar Hamlin's Collapse Highlights the Violence Black Men Experience in Football - Scientific American
Texas fan watched Damar Hamlin injury from the stands
Why Damar Hamlin's collapse marks a seismic shift for the NFL and its fans, NFL
What is commotio cordis, which NFL player Damar Hamlin says stopped his heart?
Bills' Damar Hamlin in Critical Condition After Collapsing on Field