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.
Relative concentration of the class of VOCs detected in feces (a) and urine (b) in each age group. The different colors in histogram correspond to the different groups (CENT, centenarians; ECO, elderly centenarian’s offspring; EC, elderly controls; Y, young subjects)
