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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 1091-1100 of 2190 for surgery

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  1. Durvalumab and Tremelimumab With or Without High or Low-Dose Radiation Therapy in Treating Patients With Metastatic Colorectal or Non-small Cell Lung Cancer

    Scottsdale/Phoenix, AZ, Jacksonville, FL, Rochester, MN

  2. Study of Lumbar Discectomy with Additional Implantation of an Annular Closure Device in Patients with Large Postsurgical Annular Defects

    Jacksonville, FL

  3. A Study of the Safety and Effectiveness of HBI-8000 with Nivolumab to Treat Melanoma, Renal Cell Carcinoma and Non-Small Cell Lung Cancer

  4. Individualized Treatment in Treating Patients With Stage II-IVB Nasopharyngeal Cancer Based on EBV DNA

    Rochester, MN

  5. Virtual World-based Cardiac Rehabilitation Program to Encourage Healthy Lifestyle Choices Among Cardiac Patients

    Scottsdale/Phoenix, AZ, Jacksonville, FL, Rochester, MN

  6. A Phase 1b, Multicenter, Randomized, Blinded, Placebo-controlled Study to Evaluate the Efficacy of Guselkumab in Subjects with Familial Adenomatous Polyposis

    Scottsdale/Phoenix, AZ, Jacksonville, FL

  7. Study to Evaluate Chemoembolization Combined with Durvalumab and Bevacizumab Therapy in Patients With Locoregional Hepatocellular Carcinoma

    Scottsdale/Phoenix, AZ, Rochester, MN, Jacksonville, FL

  8. Coronary CTA for Radiation Therapy Planning in Lymphoma Patients

    Rochester, MN

  9. Renal Optimization Strategies Evaluation in Acute Heart Failure and Reliable Evaluation of Dyspnea in the Heart Failure Network (ROSE) Study

    Rochester, MN

  10. Oral Treprostinil in Subjects With Pulmonary Hypertension (PH) Associated With Heart Failure With Preserved Ejection Fraction (HFpEF)

    Jacksonville, FL

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