Fig 4.
Top: Percentage and number of samples from each site; Bottom: Samples from each site categorised according to state of articulation.
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.