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.
Western Hemisphere data from past studies [30, 38]. Brz, Brazil; Arg, Argentina; Bol, Bolivia; TX, Texas; FL, Florida; PR, Puerto Rico; DR, Dominican Republic.
