Fig. 1.
Parathyroid hormone (PTH) concentration measured by immunoradiometric assay in the serum of young (3-month- old) and old (18-month-old) rats. Values are means ± SEM. * P < 0.05 vs 3 months old
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.