# NFL LONG Prospective Study

> **NCT04263337** · PHASE1 · ACTIVE_NOT_RECRUITING · sponsor: **University of North Carolina, Chapel Hill** · enrollment: 250 (estimated)

## Conditions studied

- Concussion, Brain

## Interventions

- **DRUG:** [11C] PiB
- **DRUG:** [18F] PBR111
- **DRUG:** [18F] Flortaucipir

## Key facts

- **NCT ID:** NCT04263337
- **Lead sponsor:** University of North Carolina, Chapel Hill
- **Sponsor class:** OTHER
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2020-03-12
- **Primary completion:** 2028-08
- **Final completion:** 2028-08
- **Target enrollment:** 250 (ESTIMATED)
- **Last updated:** 2026-04-22

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04263337

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04263337, "NFL LONG Prospective Study". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04263337. Licensed CC0.

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