1. Vorarlberg Institute for Vascular Investigation and Treatment (VIVIT), Feldkirch, Austria
2. Medical Central Laboratories, Feldkirch, Austria
3. Private University of the Principality of Liechtenstein, Triesen, Liechtenstein
4. Immundiagnostik AG, Bensheim, Germany
5. Department of Internal Medicine I, Academic Teaching Hospital Feldkirch, Feldkirch, Austria
6. Drexel University College of Medicine, Philadelphia, Pennsylvania