title: Can health campaigns make people ill? The iatrogenic potential of population-based cannabis prevention.
authors.forename: Harry R
authors.initials: HR
authors.lastname: Sumnall
authors.forename: Mark A
authors.initials: MA
authors.lastname: Bellis
mesh_terms: D000293:Adolescent; D001294:Attitude to Health; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D008385:Marijuana Smoking / Q000009:adverse effects / Q000517:prevention & control* / Q000523:psychology; D040241:Social Marketing