1. B Cell Immunology, German Cancer Research Center, Heidelberg, Germany.
2. Theoretical Systems Biology, German Cancer Research Center, Heidelberg, Germany.
3. BioQuant Center, University of Heidelberg, Heidelberg, Germany.
4. Faculty of Biosciences, University of Heidelberg, Heidelberg, Germany.
5. Vector Biology Unit, Max Planck Institute for Infection Biology, Berlin, Germany.
6. Sanaria Inc., Rockville, MD 20850, USA.
7. Institute of Tropical Medicine and German Center for Infection Research, University of Tübingen, Tübingen, Germany.