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.
These links are indicated by arrows in A–E and occur in both single string arrays (arrowheads in A–B) and double rows arrays (brackets in C and D). The tomogram obtained by Pigino et al. [2009] is shown in E for a comparison.
