title: The OPEL study intent and content.
mesh_terms: D003211:Concurrent Review; D003362:Cost-Benefit Analysis; D005069:Evaluation Studies as Topic; D007902:Length of Stay; D008484:Medicaid; D008485:Medical Audit; D006278:Medicare; D011366:Professional Review Organizations; D014481:United States; D014492:United States Public Health Service; D014600:Utilization Review