title: Introduction.
authors.affiliation: University of Chicago.
authors.forename: Colleen M
authors.initials: CM
authors.lastname: Grogan
mesh_terms: D062265:Health Insurance Exchanges / Q000331:legislation & jurisprudence; D006801:Humans; D058991:Patient Protection and Affordable Care Act / Q000331:legislation & jurisprudence*; D035521:Supreme Court Decisions; D014481:United States