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Abstract
Mesh: See more » AgedGroup PracticeHumansInsurance, HealthMedicareUnited States
Year: 1969 PMID: 4888020 PMCID: PMC1226471 DOI: 10.2105/ajph.59.4.624
Source DB: PubMed Journal: Am J Public Health Nations Health ISSN: 0002-9572