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.
Progression-free survival as a function of an initial disease-free (DF) state or never disease-free state (NDF) (A). The effect of DF or NDF states on later treatment-free intervals (TFI) (B); the sample size reflects the number of unique intervals with DF/NDF information. The duration of TFI as a function of the number of previous lines of therapy (C). Platinum treatment efficacy as a function of the previous platinum interval (D).
