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.
Radial histological sections of the mitral valve in various age groups with picrosirius red staining. (A) A 20–29 years, (B) 40–49 years, (C) 60–69 years, (D) 80–89 years. A, atrialis; F, fibrosa; S, spongiosa; V, ventricularis. Scale Bars=50 μm (A), 20 μm (B–D).
