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United States
Retrospective Studies
Health Care Costs
Health Expenditures
Cross-Sectional Studies
Efficiency
Cost of Illness
Factual Databases
Comorbidity
Multivariate Analysis
Quality of Life
Sleep Initiation and Maintenance Disorders
Hypertension, Pulmonary
Young Adult
Insurance Claim Review
Managed Care Programs
Insurance, Health
Hypnotics and Sedatives
Absenteeism
Cost Benefit Analysis
Co-Publications
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5
3
2
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