Fig 2. The percentage of individual post endorsements for each respective code on the effects of cannabis on ADHD per year (2004–2014) among the 401 posts analyzed.
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.