title: Freeze frame. Targeted ads in D.C. subway stations.
authors.forename: Matthew
authors.initials: M
authors.lastname: Weinstock
mesh_terms: D000329:Advertising; D000573:American Hospital Association; D004219:District of Columbia; D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000331:legislation & jurisprudence*; D006278:Medicare / Q000331:legislation & jurisprudence*; D010820:Physicians; D011057:Politics; D014481:United States