1 2 Department of Medicine, Centre for Rheumatology, Lower Austria, State Hospital Stockerau, Karl Landsteiner Institute for Clinical Rheumatology, Stockerau burkhard.leeb@stockerau.lknoe.at leeb.rheuma@aon.at.
2 Private Rheumatology Office, Hollabrunn.
3 Department for Rheumatology and Immunology, Medical University of Graz, Graz, Austria.