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A volunteer subject with no known significant health problems who participates in research to test a new drug, device or intervention. These volunteers are recruited to serve as controls for patient groups. Healthy volunteers receive the same test, procedure, or drug the patient group receives.

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During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

Search Results 461-470 of 2188 for surgery

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  1. Characteristics of Stem Cells Obtained from the Fat Pat Surrounding the Pericardium

    Jacksonville, FL

  2. Comparative Performance of Dynamic Elastic Response Feet

    Rochester, MN

  3. Stereotactic Body Radiotherapy (SBRT) Versus Sublobar Resection for High-Risk Patients with Early Stage Non-Small Lung Cancer (NSCLC)

    Rochester, MN

  4. Wearables for Assessing Nontechnical and Technical Skills

  5. Treatment of Thrombocytopenia in Patients With Chronic Liver Disease Undergoing an Elective Procedure

    Rochester, MN

  6. Ultrasound Utility in Carpal Tunnel Syndrome

    Scottsdale/Phoenix, AZ

  7. The Role of Therapy for Muscle Tension Dysphagia

    Scottsdale/Phoenix, AZ

  8. Studies using Doubly Labeled Water in Measuring Total Energy Expenditure

    Rochester, MN

  9. Utilization and Storage of Liposuction Aspirate in Humans

    Jacksonville, FL

  10. Efficacy of Riluzole in Surgical Treatment for Cervical Spondylotic Myelopathy (CSM-Protect)

    Rochester, MN

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