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.
Kaplan−Meier curve showing time to first serious safety warning or removal from market for new active substances: approval through NOC/c vs. priority review. 
, NOC/c; 
, priority review. No significant difference between curves, P = 0.5940, log rank (Mantel−Cox) test
