title: Enrollment trends in Medicare managed care plans.
authors.affiliation: Department of Community Health, Brown University School of Medicine, USA.
authors.forename: J S
authors.initials: JS
authors.lastname: Buechner
mesh_terms: D000368:Aged; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data* / Q000639:trends; D006801:Humans; D006278:Medicare / Q000706:statistics & numerical data / Q000639:trends*; D012189:Retrospective Studies; D014481:United States