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 locations of our 11 sites, from Yin et al. (38). Sites are labeled as follows: b, Vitebsk, Belarus/Smolensk, Russia; bh, Bosnia and Herzegovina; c, Chongqing, China; g, Goiás, Brazil; i, Iraq; mg, Mato Grosso, Brazil; n, Nebraska/Wyoming, USA; o, Orenburg, Russia/Uralsk, Kazakhstan; s, Shaanxi/Shanxi, China; v, Volgograd, Russia; w, Wisconsin, USA.
