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United States
Missouri
Ontario
Medicaid
Referral and Consultation
Physician's Practice Patterns
Questionnaires
Managed Care Programs
Knee Replacement Arthroplasties
Health Services Research
Primary Health Care
Delivery of Health Care
Knee Prosthesis
Osteoarthritis
Medicare
Treatment Outcome
Quality of Health Care
Regression Analysis
Age Factors
Emergency Service, Hospital
Co-Publications
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