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.
(A) Gray matter volumetric change in sustained abstainers/light and (B) sustained heavy users across the two year period. Results are displayed at p < 0.05 FWE corrected across the whole brain. Images are on a negative log P scale. Note that both groups only showed significant decline and no expansions.
