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Pediatrics
Medicine
Disabled Children
Newborn Infant
Infants
Cross-Sectional Studies
Multivariate Analysis
Specialization
Socioeconomic Factors
Medicare Part B
Chronic Disease
Neonatal Hyperbilirubinemia
Medicaid
Physician's Practice Patterns
Referral and Consultation
Questionnaires
United States
Healthy People Programs
Urban Health Services
Institute of Medicine (U.S.)
Co-Publications
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