title: Competing interests are a complex problem.
authors.affiliation: CMAJ.
authors.forename: Roger
authors.initials: R
authors.lastname: Collier
mesh_terms: D035843:Biomedical Research / Q000458:organization & administration*; D016265:Conflict of Interest / Q000191:economics* / Q000331:legislation & jurisprudence*; D003299:Cooperative Behavior; D004345:Drug Industry; D006801:Humans; D009316:National Institutes of Health (U.S.); D014481:United States