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.
Reference intervals (upper panel, males; lower panel, females) according to the age intervals of the eight immunoassays tested. Lower limits (2.5th percentile) and upper limits (97.5th percentile) of the normal range are drawn as full lines and medians as dotted lines. Each assay has a different color.
This work is licensed under a