1. Department of Rheumatology, Acute Rheumatology Center, 55543 Bad Kreuznach, Germany
2. Department of Internal Medicine I, Division of Rheumatology and Clinical Immunology, University Medical Center, Johannes Gutenberg University, 55131 Mainz, Germany
3. Institute for Pathology, 54292 Trier, Germany
4. Department of Rheumatology, Karl-Aschoff Clinic, 55543 Bad Kreuznach, Germany