| NCT Number | NCT07535554 |
| Lead Sponsor | Universitaire Ziekenhuizen KU Leuven |
| Conditions | Fever of Unknown Origin, IgG4 Related Disease, Axial Spondylarthritis (axSpA), Inflammation of Unknown Origin |
| Enrollment | 140 participants |
| Start Date | 2025-09-17 |
| Primary Completion | 2029-03-31 (estimated) |
| Study Completion | 2030-03-31 (estimated) |
| Updated on ClinicalTrials.gov | 2026-04-17 |