1. Department of Internal Medicine VI, Infectious Diseases, Immunology, Rheumatology, Pneumology; Medical University of Innsbruck; 6020 Innsbruck Austria
2. Division of Clinical Biochemistry; Medical University of Innsbruck; 6020 Innsbruck Austria
3. Instituto Gulbenkian de Ciência; 2780-156 Oeiras Portugal
4. Department of Laboratory Medicine; Medical University of Vienna; 1090 Vienna Austria
5. University of Washington School of Medicine; 1959 NE Pacific Street Seattle WA 98195-7735 USA
6. Division of Molecular Pathophysiology; Medical University of Innsbruck; 6020 Innsbruck Austria