Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Unadjusted (A) and risk-adjusted (B) Kaplan-Meier curves for death according to endoscopic versus open vein-graft harvest technique among 235,394 North American patients undergoing isolated CABG 2003–2008
A. Unadjusted mortality curve
B. Risk-adjusted mortality curve
