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.
EFS and OS according to the proposed risk stratification model. EFS (solid line, training cohort; dotted line, validation cohort) (A) and OS (solid line, training cohort; dotted line, validation cohort) (B) based on the proposed risk stratification model.
