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.
Unstratified lod score is represented by solid line and stratified lod score by dashed line. Horizontal dotted line identifies the threshold for significant evidence of linkage.
