Damar Hamlin collapsed. Mom whose son died of cardiac arrest grieved
Damar Hamlin plays in first NFL game since cardiac arrest
EXPLAINER: What happened to Damar Hamlin?
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Arizona teen died from rare condition doctors believe Bills' Damar
Bills' Damar Hamlin OK to play after suffering cardiac arrest - ESPN
Damar Hamlin shows 'remarkable improvement,' remains in critical
13-year-old died from rare condition doctors believe Bills' Damar