title: Sending out shock waves. UnitedHealth to add PacifiCare's Medicare market.
authors.forename: Laura B
authors.initials: LB
authors.lastname: Benko
mesh_terms: D000368:Aged; D002140:California; D006273:Health Facility Merger; D006801:Humans; D008329:Managed Care Programs / Q000458:organization & administration* / Q000706:statistics & numerical data; D006278:Medicare; D008910:Minnesota; D010067:Ownership