J J Callahan. Show Affiliations »
Abstract
Entities: Species
Mesh: See more » Delivery of Health CareFinancing, GovernmentMedicaidMedicarePatientsPovertySocial WelfareUnited States
Year: 1972 PMID: 4553970 DOI: 10.1056/NEJM197206082862312
Source DB: PubMed Journal: N Engl J Med ISSN: 0028-4793 Impact factor: 91.245