1. Molecular Immunology, Robert Koch-Institute, 13353 Berlin, Germany
2. Institute of Biochemistry, Charité University Hospital, Humboldt University, 10117 Berlin, Germany
3. Rudolf-Boehm-Institute of Pharmacology and Toxicology, 04107 Leipzig, Germany
4. Institute of Transfusion Medicine, Charité University Hospital, Humboldt University, 13353 Berlin, Germany