Figure 2.
Refined thematic map. Ovals represent main themes and rectangles represent subthemes within each main theme. Solid lines illustrate connections between main themes and subthemes.
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.