# Studies in Porphyria I: Characterization of Enzyme Defects

> **NCT00004331** · — · UNKNOWN · sponsor: **National Center for Research Resources (NCRR)** · enrollment: 25 (—)

## Conditions studied

- Porphyria

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00004331
- **Lead sponsor:** National Center for Research Resources (NCRR)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 1992-11
- **Primary completion:** —
- **Final completion:** —
- **Target enrollment:** 25 (—)
- **Last updated:** 2005-06-24

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00004331

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00004331, "Studies in Porphyria I: Characterization of Enzyme Defects". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT00004331. Licensed CC0.

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