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North Carolina
United States
Prospective Studies
Cohort Studies
Cross-Sectional Studies
Prevalence
Risk Factors
Logistic Models
Socioeconomic Factors
Treatment Outcome
Life Support Care
Questionnaires
Patient Acceptance of Health Care
Physician's Practice Patterns
Low Back Pain
Acute Disease
Family Practice
Health Care Surveys
Pregnancy
African Americans
Co-Publications
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11
6
5
4
3
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