1. European Molecular Biology Laboratory (EMBL), Directors' Research, Meyerhofstrasse 1, 69117 Heidelberg, Germany
2. Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital, University of Bonn, Venusberg Campus 1, 53127 Bonn, Germany
3. Unit of Experimental Immunology, Institute of Tropical Medicine, 2000 Antwerp, Belgium
4. National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, UK
5. Department of Hematology, Oncology, Immunology, and Rheumatology, University Hospital of Tübingen, Otfried-Müller-Strasse 10, 72076 Tübingen, Germany