1. Section of Immunobiology, Institute of GeneticsUniversity of Bonn Bonn Germany
2. Department of Molecular CardiologyUniversity of Düsseldorf Düsseldorf Germany
3. Department of BiosciencesUniversity of Oslo Oslo Norway
4. Membrane Biochemistry, Life and Medical Sciences InstituteUniversity of Bonn Bonn Germany
5. Institute of VirologyUniversity of Bonn Medical Centre, University of Bonn Bonn Germany