Figure 1.
Median blood lead levels of Korean lead workers from 2003 to 2011. The values are reported as the 25th, 50th, and 75th percentiles for each year.
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.