From Deseret News archives:
How it works ...
• A treatment trial tests new treatments, such as a medication or a surgical technique.
• Prevention trials look for better ways to keep people from getting a specific disease.
• Diagnostic trials are used to find better tests or procedures to make a diagnosis.
• Screening trials test the best detection methods.
Quality-of-life trials are focused on comfort and life issues of those with a chronic condition.
Source: The National Institutes of Health.
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