Clinical trial phase

{
  "id": "MLC-T-ONC-001835",
  "term": "Clinical trial phase",
  "field": "Oncology and biomedicine",
  "definition": "A part of the clinical research process that answers specific questions about whether treatments or other interventions that are being studied work and are safe. Phase I trials test the best way to give a new treatment and the best dose. Phase II trials test whether a new treatment has an effect on the disease. Phase III trials compare the results of people taking a new treatment with the results of people taking the standard treatment. Phase IV trials are done using thousands of people after a treatment has been approved and marketed, to check for side effects that were not seen in the phase III trial.",
  "references": [
    "NCI Dictionary of Cancer Terms"
  ],
  "url": "https://mlchart.com/terminology/oncology/clinical-trial-phase/"
}