# ATHN 9: Severe VWD Natural History Study

> **NCT03853486** · — · ACTIVE_NOT_RECRUITING · sponsor: **American Thrombosis and Hemostasis Network** · enrollment: 108 (actual)

## Conditions studied

- Von Willebrand Diseases

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT03853486
- **Lead sponsor:** American Thrombosis and Hemostasis Network
- **Sponsor class:** NETWORK
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ACTIVE_NOT_RECRUITING
- **Start date:** 2019-06-18
- **Primary completion:** 2025-12-31
- **Final completion:** 2026-07-30
- **Target enrollment:** 108 (ACTUAL)
- **Last updated:** 2025-03-12

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03853486

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03853486, "ATHN 9: Severe VWD Natural History Study". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT03853486. Licensed CC0.

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