Demographic and clinical data of the patients
| Characteristic | Mean value±SD (range) |
| Age (years) | 52.0±14 (23–74) |
| Gender: female/male | 11/9 |
Diagnosis, nine rheumatoid arthritis, three psoriatic arthritis, three systemic sclerosis, two undifferentiated chronic arthritis, one antiphospholipid antibody syndrome, one Behçet’s disease, one undifferentiated connective tissue disease.