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Veterans
European Continental Ancestry Group
African Americans
Hospitals, Veterans
Cohort Studies
Severity of Illness Index
Comorbidity
Patient Satisfaction
Treatment Outcome
Reproducibility of Results
Retrospective Studies
Risk Adjustment
Time Factors
Prevalence
United States
Texas
United States Department of Veterans Affairs
Patient Readmission
Double-Blind Method
Pulmonary Disease, Chronic Obstructive
Co-Publications
23
19
10
9
8
6
5
4
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