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.
Representative structures of (A) site 1 and (B) site 3. Volume densities of the three selected representative structures are depicted in blue. The corresponding cluster identifier is shown in each case.
