{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Proton+Collaborative+Group",
    "query": {
      "sponsor": "Proton Collaborative Group"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-03T06:40:42.202Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT01770418",
      "title": "A Phase I/II Study of Hypofractionated Proton Therapy for Stage II-III Non-Small Cell Lung Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Lung Neoplasms"
      ],
      "interventions": [
        {
          "name": "Radiation with Concurrent Chemotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 32,
      "start_date": "2013-03",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2025-09-09",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 6,
      "location_summary": "Jacksonville, Florida • Warrenville, Illinois • Baltimore, Maryland + 3 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Somerset",
          "state": "New Jersey"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01770418"
    },
    {
      "nct_id": "NCT05856773",
      "title": "Conventionally Fractionated vs. Hypofractionated Comprehensive Nodal Irradiation for Breast Cancer Using Pencil Beam Scanning Proton Therapy",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [
        {
          "name": "Proton Therapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "19 Years and older · Female only"
      },
      "enrollment_count": 276,
      "start_date": "2024-03-21",
      "completion_date": "2041-02",
      "has_results": false,
      "last_update_posted_date": "2026-07-10",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 9,
      "location_summary": "Scottsdale, Arizona • San Diego, California • Jacksonville, Florida + 5 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05856773"
    },
    {
      "nct_id": "NCT01230866",
      "title": "Study of Hypo-fractionated Proton Radiation for Low Risk Prostate Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Proton Radiation Hypofractionation",
          "type": "RADIATION"
        },
        {
          "name": "Proton Radiation Standard Fractionation",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 150,
      "start_date": "2010-11",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 5,
      "location_summary": "Phoenix, Arizona • Warrenville, Illinois • Baltimore, Maryland + 2 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        },
        {
          "city": "Hampton",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01230866"
    },
    {
      "nct_id": "NCT02598349",
      "title": "Proton Radiation for Unresectable, Borderline Resectable, or Medically Inoperable Carcinoma of the Pancreas",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pancreatic Cancer"
      ],
      "interventions": [
        {
          "name": "Proton Radiation",
          "type": "RADIATION"
        },
        {
          "name": "Capecitabine",
          "type": "DRUG"
        },
        {
          "name": "Surgical resection",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "DRUG",
        "PROCEDURE"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2016-04",
      "completion_date": "2040-10",
      "has_results": false,
      "last_update_posted_date": "2025-09-09",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 4,
      "location_summary": "Jacksonville, Florida • Warrenville, Illinois • Flint, Michigan + 1 more",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Flint",
          "state": "Michigan"
        },
        {
          "city": "Fairfax",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02598349"
    },
    {
      "nct_id": "NCT01766297",
      "title": "Phase II Protocol of Proton Therapy for Partial Breast Irradiation in Early Stage Breast Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer",
        "Breast Neoplasm",
        "Breast Tumor",
        "Cancer of the Breast"
      ],
      "interventions": [
        {
          "name": "Proton Radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "50 Years and older · Female only"
      },
      "enrollment_count": 132,
      "start_date": "2013-02",
      "completion_date": "2035-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-09",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 9,
      "location_summary": "Scottsdale, Arizona • San Diego, California • Warrenville, Illinois + 6 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Flint",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01766297"
    },
    {
      "nct_id": "NCT01255748",
      "title": "Registry Study for Radiation Therapy Outcomes",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Neoplasms"
      ],
      "interventions": [
        {
          "name": "Proton Therapy, Photon Therapy, SRS, Brachytherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 50000,
      "start_date": "2009-06",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2026-07-10",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 29,
      "location_summary": "Scottsdale, Arizona • Little Rock, Arkansas • San Diego, California + 25 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Delray Beach",
          "state": "Florida"
        },
        {
          "city": "Fort Myers",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01255748"
    },
    {
      "nct_id": "NCT00969111",
      "title": "Postoperative or Salvage Radiotherapy (RT) for Node Negative Prostate Cancer Following Radical Prostatectomy",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "IMRT to 45 Gy; prostate bed proton boost of 21.6 CGE",
          "type": "RADIATION"
        },
        {
          "name": "Proton (prostate bed) to 70.2 CGE",
          "type": "RADIATION"
        },
        {
          "name": "IMRT to 45 Gy; proton boost to prostate bed to 25.2 CGE",
          "type": "RADIATION"
        },
        {
          "name": "Proton to 66.6 CGE",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 70,
      "start_date": "2009-08",
      "completion_date": "2050-08",
      "has_results": false,
      "last_update_posted_date": "2026-06-17",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 6,
      "location_summary": "Little Rock, Arkansas • Jacksonville, Florida • Warrenville, Illinois + 3 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Flint",
          "state": "Michigan"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00969111"
    },
    {
      "nct_id": "NCT01492972",
      "title": "Hypo-fractionated Radiation Therapy With or Without Androgen Suppression for Intermediate Risk Prostate Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Radiation",
          "type": "RADIATION"
        },
        {
          "name": "Androgen Suppression Therapy",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "RADIATION",
        "DRUG"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 192,
      "start_date": "2012-01",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 4,
      "location_summary": "Scottsdale, Arizona • Warrenville, Illinois • Oklahoma City, Oklahoma + 1 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        },
        {
          "city": "Hampton",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01492972"
    },
    {
      "nct_id": "NCT01603420",
      "title": "External Beam Radiation With or Without Chemotherapy to Treat High Risk Prostate Cancer",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Prostate Cancer"
      ],
      "interventions": [
        {
          "name": "Luteinizing hormone-releasing hormone (LHRH)",
          "type": "DRUG"
        },
        {
          "name": "Docetaxel",
          "type": "DRUG"
        },
        {
          "name": "Conformal Radiation Therapy (RT)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "MALE",
        "summary": "18 Years to 75 Years · Male only"
      },
      "enrollment_count": 2,
      "start_date": "2012-07",
      "completion_date": "2014-05",
      "has_results": true,
      "last_update_posted_date": "2016-03-14",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 3,
      "location_summary": "Warrenville, Illinois • Oklahoma City, Oklahoma • Hampton, Virginia",
      "locations": [
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        },
        {
          "city": "Hampton",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01603420"
    },
    {
      "nct_id": "NCT01758445",
      "title": "Proton Radiation for Stage II/III Breast Cancer",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Breast Cancer",
        "Breast Neoplasm",
        "Breast Tumor",
        "Cancer of the Breast"
      ],
      "interventions": [
        {
          "name": "Proton Radiotherapy",
          "type": "RADIATION"
        }
      ],
      "intervention_types": [
        "RADIATION"
      ],
      "sponsor": "Proton Collaborative Group",
      "sponsor_class": "NETWORK",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 220,
      "start_date": "2013-02",
      "completion_date": "2032-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-09-03T06:40:42.202Z",
      "location_count": 5,
      "location_summary": "Warrenville, Illinois • Baltimore, Maryland • Somerset, New Jersey + 2 more",
      "locations": [
        {
          "city": "Warrenville",
          "state": "Illinois"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Somerset",
          "state": "New Jersey"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        },
        {
          "city": "Hampton",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01758445"
    }
  ]
}