Enrollment trends in Medicare managed care plans.
Buechner
J S
JS
Department of Community Health, Brown University School of Medicine, USA.
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