title: Challenges loom for US health law as new insurance begins.
authors.forename: Susan
authors.initials: S
authors.lastname: Jaffe
mesh_terms: D006801:Humans; D009310:National Health Insurance, United States / Q000331:legislation & jurisprudence*; D010342:Patient Acceptance of Health Care / Q000706:statistics & numerical data; D058991:Patient Protection and Affordable Care Act; D014481:United States; D019472:Universal Health Insurance / Q000331:legislation & jurisprudence*