Rare combination of factors likely led to Damar Hamlin's on-field cardiac arrest, Houston heart doctor says – Houston Public Media
Why did Damar Hamlin collapse during the Bills-Bengals game?
Audio: Damar Hamlin Emergency Response Captured on Recordings - The New York Times
Idaho cardiologist speaks on the importance of CPR after NFL cardiac emergency
What caused Buffalo Bills' Damar Hamlin's cardiac arrest? Doctors say his heart likely healthy before collapse
Damar Hamlin's cardiac arrest: What to know
What is commotio cordis, which NFL player Damar Hamlin says stopped his heart?
Bills safety Damar Hamlin eases back into practice 5 months since near-death experience
Damar Hamlin: screening may not have prevented collapse
Bills safety Damar Hamlin plans on 'making a comeback' to NFL, details cause of cardiac arrest