1. Institute of Molecular Medicine and I. Department of Medicine, Johannes Gutenberg University of Mainz, 55131 Mainz, Germany
2. Department of Immunology, Genentech, South San Francisco, CA 94080
3. Institut Universitaire de Pathologie, Centre Hospitalier, Universitaire Vaudois, 1011 Lausanne, Switzerland
4. Department of Medicine 1, University Hospital Erlangen, 91054 Erlangen, Germany