In 1995, the US gov silenced the largest ever study of cocaine use.
tni.org
tni.org
The Transnational Institute (TNI) of Policy Studies:
carries out radical informed analysis on critical global issues
builds alliances with social movements
develops proposals for a more sustainable, just and democratic world. More
"The Briefing Kit had been a premature release of the summary results, before the full research outcomes had gone through the usual thorough review and editing process."
EG - no peer reviewed study exists, this link itself is based on a non-peer edited summary of the actual study.