https://www.drugpolicy.org/blog/e-cigarettes-and-maintenance-therapy-smart-public-health-approach
5150sick Under Ground Hustler Staff member VU Administrator Senior Moderator VU Donator Diamond Contributor Press Corps Member For 5 Years Mod Team Leader Sep 22, 2014 #1 https://www.drugpolicy.org/blog/e-cigarettes-and-maintenance-therapy-smart-public-health-approach