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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 1-4 of 4 for

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  1. A Study of Proton Radiation Divided into Fewer Doses for Low Risk Prostate Cancer

    Scottsdale/Phoenix, AZ, Rochester, MN

  2. Hypo-fractionated Proton Radiation Therapy With or Without Androgen Suppression for Intermediate Risk Prostate Cancer

    Scottsdale/Phoenix, AZ

  3. A Study of Proton Versus Photon Beam Radiotherapy in the Treatment of Unilateral Head and Neck Cancer

    Rochester, MN

  4. A Registry for Children Treated with Proton Radiation Therapy

    Rochester, MN

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