title: Comparing cannabis with tobacco: services are needed for acute and chronic effects of cannabis.
authors.forename: Roy
authors.initials: R
authors.lastname: Robertson
mesh_terms: D003695:Delivery of Health Care; D006801:Humans; D002189:Marijuana Abuse / Q000628:therapy; D008385:Marijuana Smoking / Q000009:adverse effects*; D012907:Smoking / Q000009:adverse effects