Multi-hospital-sponsored HMOs.
D003659:Decision Making, Organizational; D006279:Health Maintenance Organizations / Q000458:organization & administration*; D006739:Hospital Administration / Q000639:trends*; D006754:Hospital Restructuring / Q000639:trends*; D007449:Investments; D010067:Ownership; D012017:Referral and Consultation; D012051:Reimbursement Mechanisms; D014481:United States