title: Comparing cannabis with tobacco--again.
mesh_terms: D000293:Adolescent; D000328:Adult; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000401:mortality*; D008875:Middle Aged; D012307:Risk Factors; D012907:Smoking / Q000401:mortality