Why did Damar Hamlin collapse?
EXPLAINER: What Bills-Bengals cancellation does to playoffs
NFL says Bills-Bengals game won't resume this week, no changes to Week 18 schedule
Buffalo's Damar Hamlin in critical condition after collapse on field
Bills safety Damar Hamlin back in Buffalo to resume recovery - The Globe and Mail
NFL Players Return to Practice After Damar Hamlin's Collapse - The New York Times
Bills safety Damar Hamlin remains in critical condition in hospital ICU; game will not resume this week
Report: Bills' Josh Allen Appears in Line to Start vs. Vikings; Barkley Not Elevated, News, Scores, Highlights, Stats, and Rumors
Buffalo Bills safety Damar Hamlin collapses on field, gets CPR
NFL: Bills-Bengals Game Won't Resume This Week After Hamlin Collapse
Buffalo Bills Safety Damar Hamlin Remains in Critical Condition After Collision
Damar Hamlin won't play in the Bills' opener against the Jets
Bills' Hamlin in critical condition after collapse on field, Local News
Bills' Hamlin in critical condition after suffering cardiac arrest during game against Bengals
NFL did not seek to resume game after Damar Hamlin's injury, league official says