Figure 5.
Publication bias. (A) publication bias for OS. (B) trim-and-fill method for OS. (C) publication bias for DFS/PFS.
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.