Next few days critical in Damar Hamlin's recovery, doctors say
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest
Damar Hamlin's Cardiac Arrest: What We Know and Don't Know - The New York Times
Damar Hamlin: What we know and updates for Jan. 3
Medical officials say NFL player Damar Hamlin has made 'substantial improvement'
Damar Hamlin Cleared to Return to Football - Southern Iowa Mental Health Center
Buffalo Bills star Damar Hamlin's on-field collapse puts spotlight on cardiac arrest in young people - Good Morning America
Local medical experts talk about Damar Hamlin's cardiac arrest
Buffalo Bills safety Damar Hamlin takes the field in first NFL game since cardiac arrest - CBS News
Damar Hamlin's injury on Monday Night Football laid bare the game's toll