Aortic Dissection — Developing a Decision Instrument to Guide Abdominal-pelvic CT Imaging of Blunt Trauma Patients
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Developing a Decision Instrument to Guide Abdominal-pelvic CT Imaging of Blunt Trauma Patients
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
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Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
