1. Clinic of Internal Medicine and Angiology, Helios Klinikum Salzgitter, Salzgitter, Germany.
2. Department of Rheumatology, Klinik St. Katharinental, Spital Thurgau AG, Diessenhofen, Switzerland.
3. Clinic of Rheumatology, Kantonsspital St. Gallen, St. Gallen, Switzerland.
4. Division of Cardiology, Department of Internal Medicine I, University Hospital Jena, Jena, Germany.
5. Division of Rheumatology, Department of Internal Medicine III, University Hospital Jena, Jena, Germany.
6. Experimental Nephrology, Clinic of Internal Medicine III, University Hospital Jena, Friedrich Schiller University Jena, Jena, Germany.
7. Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty, University Duesseldorf, Duesseldorf, Germany.