{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Marshfield+Clinic+Research+Foundation",
    "query": {
      "sponsor": "Marshfield Clinic Research Foundation"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 13,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Marshfield+Clinic+Research+Foundation&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-06T04:33:25.842Z",
  "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": "NCT00555893",
      "title": "Efficacy Study of Early Versus Late Oseltamivir Administration for Treating and Preventing Influenza",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Oseltamivir",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Year",
        "maximum_age": "79 Years",
        "sex": "ALL",
        "summary": "1 Year to 79 Years"
      },
      "enrollment_count": 194,
      "start_date": "2008-01",
      "completion_date": "2011-02",
      "has_results": true,
      "last_update_posted_date": "2018-10-16",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00555893"
    },
    {
      "nct_id": "NCT02250274",
      "title": "Randomized Study of Immune Response to Licensed Influenza Vaccines in Children and Adolescents",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Immune Response to Influenza Vaccine",
        "Influenza A Virus Infection",
        "Influenza B Virus Infection"
      ],
      "interventions": [
        {
          "name": "LAIV",
          "type": "BIOLOGICAL"
        },
        {
          "name": "IIV",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "5 Years to 17 Years"
      },
      "enrollment_count": 131,
      "start_date": "2014-09",
      "completion_date": "2015-04",
      "has_results": true,
      "last_update_posted_date": "2018-04-26",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02250274"
    },
    {
      "nct_id": "NCT00484640",
      "title": "Modeling Genotype and Other Factors to Enhance the Safety of Coumadin Prescribing",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Atrial Fibrillation",
        "Deep Venous Thrombosis",
        "Heart Valve Replacement",
        "Pulmonary Embolism"
      ],
      "interventions": [
        {
          "name": "Coumadin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Agency for Healthcare Research and Quality (AHRQ)",
      "sponsor_class": "FED",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 260,
      "start_date": "2007-06",
      "completion_date": "2008-05",
      "has_results": false,
      "last_update_posted_date": "2007-06-11",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 2,
      "location_summary": "Madison, Wisconsin • Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        },
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00484640"
    },
    {
      "nct_id": "NCT02872311",
      "title": "Open-Label Influenza Vaccine Evaluation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Immune Response"
      ],
      "interventions": [
        {
          "name": "High Dose Influenza vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Adjuvanted Influenza vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Standard Dose Influenza vaccine",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Recombinant Influenza vaccine",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "65 Years to 74 Years"
      },
      "enrollment_count": 179,
      "start_date": "2016-09",
      "completion_date": "2018-09",
      "has_results": true,
      "last_update_posted_date": "2025-12-10",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02872311"
    },
    {
      "nct_id": "NCT05148559",
      "title": "Impact of Adolescent Vaccine Reminder Notices Sent Via Preferred Method of Communication on HPV Vaccination",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Papillomavirus Vaccines"
      ],
      "interventions": [
        {
          "name": "Reminder Sent Via Preferred Method of Communication",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Reminder Sent Via Mailed Letter",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Huong Nguyen, PhD",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "12 Years",
        "sex": "ALL",
        "summary": "12 Years to 12 Years"
      },
      "enrollment_count": 5451,
      "start_date": "2021-08-12",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2025-11-21",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05148559"
    },
    {
      "nct_id": "NCT03598439",
      "title": "Randomized Influenza Vaccine Evaluation of Immune Response",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Influenza"
      ],
      "interventions": [
        {
          "name": "Standard IIV4",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Recombinant",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Cell-culture",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "18 Years to 64 Years"
      },
      "enrollment_count": 366,
      "start_date": "2018-07-30",
      "completion_date": "2024-07-09",
      "has_results": false,
      "last_update_posted_date": "2025-11-21",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03598439"
    },
    {
      "nct_id": "NCT01995461",
      "title": "Bilateral Transforaminal Epidural Steroid Injections for Degenerative Lumbar Spinal Stenosis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spinal Stenosis, Lumbar Region, With Neurogenic Claudication"
      ],
      "interventions": [
        {
          "name": "bilateral transforaminal epidural steroid injections",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "40 Years to 90 Years"
      },
      "enrollment_count": 26,
      "start_date": "2013-05",
      "completion_date": "2014-06",
      "has_results": true,
      "last_update_posted_date": "2015-11-24",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01995461"
    },
    {
      "nct_id": "NCT05571657",
      "title": "COVID-19 Booster Dose Reminder/Recall for Adolescents",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "COVID-19 Vaccines"
      ],
      "interventions": [
        {
          "name": "Reminder/Recall Sent Via Preferred Method of Communication",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "12 Years to 17 Years"
      },
      "enrollment_count": 4304,
      "start_date": "2022-05-12",
      "completion_date": "2022-12-31",
      "has_results": false,
      "last_update_posted_date": "2022-10-13",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05571657"
    },
    {
      "nct_id": "NCT03641989",
      "title": "Correlation Between Oral Health and Systemic Inflammation (COHESION)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Inflammation",
        "Periodontal Disease",
        "Gingivitis"
      ],
      "interventions": [
        {
          "name": "Plaque disclosing toothpaste",
          "type": "OTHER"
        },
        {
          "name": "Non-plaque disclosing toothpaste",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "84 Years",
        "sex": "ALL",
        "summary": "21 Years to 84 Years"
      },
      "enrollment_count": 112,
      "start_date": "2018-09-17",
      "completion_date": "2019-12-30",
      "has_results": false,
      "last_update_posted_date": "2020-02-20",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03641989"
    },
    {
      "nct_id": "NCT02329210",
      "title": "Clinical Registry Investigating Bardet-Biedl Syndrome",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bardet-Biedl Syndrome"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Marshfield Clinic Research Foundation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1200,
      "start_date": "2014-06",
      "completion_date": "2030-12",
      "has_results": false,
      "last_update_posted_date": "2022-07-19",
      "last_synced_at": "2026-10-06T04:33:25.842Z",
      "location_count": 1,
      "location_summary": "Marshfield, Wisconsin",
      "locations": [
        {
          "city": "Marshfield",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02329210"
    }
  ]
}