title: Court amends its opinion in Marshfield Clinic ruling.
authors.forename: M C
authors.initials: MC
authors.lastname: Jaklevic
mesh_terms: D054598:Blue Cross Blue Shield Insurance Plans / Q000331:legislation & jurisprudence*; D004465:Economic Competition / Q000331:legislation & jurisprudence; D006123:Group Practice / Q000331:legislation & jurisprudence*; D014481:United States; D014485:United States Federal Trade Commission; D014922:Wisconsin