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.
Figure 8 in ref. 13 and Swanton, Greslin, and Prescott. 1980. Chromosoma 77:203-215.
