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.
Spatial distribution of study countries by regions of Sub-Saharan Africa. Source: constructed based on shapefiles from https://tapiquen-sig.jimdofree.com/descargas-gratuitas/mundo/ (1 December 2020) with permission from Carlos Efrain Porto Tapiquen, 2021.
