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Abstract
Mesh: See more » Delivery of Health CareEconomics, MedicalHealth Maintenance OrganizationsMassachusettsOrganization and AdministrationRural Health
Year: 1974 PMID: 4853318 DOI: 10.1056/NEJM197409122911112
Source DB: PubMed Journal: N Engl J Med ISSN: 0028-4793 Impact factor: 91.245