What is commotio cordis and did Demar Hamlin suffer a heart attack because of it?
2023 Buffalo Bills Injury Preview - Banged Up Bills
Bills starting middle linebacker spot still unsettled entering preseason finale at Chicago - The San Diego Union-Tribune
NFL playoffs: Bills ended 17-year drought, longest in major sports
I can't do anything else but smile Dane Jackson 'feels good' after first practice back with the team
Damar Hamlin update: Bills player in ICU with 'signs of improvement'
Bills Safety Damar Hamlin Suffered Cardiac Arrest On Field, In Critical Condition
Josh Allen And His Turnover Issues Create A Major Problem For The Buffalo Bills
Observations: Josh Allen leads TD drive in Bills' win
Bills safety Damar Hamlin in critical condition after collapse during game
Bills return to field after Damar Hamlin injury defies belief - Sports Illustrated
Buffalo Bills - latest news, breaking stories and comment - The Independent
Buffalo Bills: Is this the year for the long-suffering team?
Damar Hamlin, Buffalo Bills safety, collapses after suffering cardiac arrest - WINK News
Damar Hamlin's Collapse Tests Buffalo Again: 'Karma Owes Us' - The New York Times