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.
Distribution of serum kyn/trp ratio and early progressions in study population (A). Distribution of serum kyn/trp ratio and early progression according to primary tumor site (B) and on the basis of the squamous histology (C). kyn, kynurenine; trp, tryptophan.
