title: AMA goes on offensive. Aetna, Cigna sued over alleged underpayments, more legal action possible.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Vesely
mesh_terms: D000574:American Medical Association; D007349:Insurance, Health, Reimbursement / Q000191:economics* / Q000331:legislation & jurisprudence*; D014481:United States