title: Caremark's gain is Medco's loss.
authors.forename: Cheryl A
authors.initials: CA
authors.lastname: Thompson
mesh_terms: D001130:Arizona; D054598:Blue Cross Blue Shield Insurance Plans; D003284:Contract Services; D011307:Drug Prescriptions; D005431:Florida; D006801:Humans; D010593:Pharmaceutical Services / Q000458:organization & administration*; D011177:Postal Service