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Pneumonia
Syncope
Community-Acquired Infections
Electrocardiography
Cardiac Arrhythmias
Orthostatic Hypotension
Prospective Studies
Risk Factors
Cohort Studies
Severity of Illness Index
Length of Stay
Multivariate Analysis
Pennsylvania
United States
Hospitalization
Diagnosis, Differential
Tilt-Table Test
Outcome Assessment (Health Care)
Questionnaires
Recurrence
Co-Publications
42
26
21
20
14
6
5
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