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.
The inhomogeneities of the cusp margin are labeled by white arrows. Below the orientation of the views are given by arrows in corresponding 2D short axis views (d-f).
