1. Institutes of Molecular Medicine and Experimental Immunology; Department of Neurology; Department of Psychiatry and Institute of Molecular Psychiatry; Life and Medical Sciences Institute for Molecular Immunology, for Genomics and Immunoregulation, and for Chemical Biology; and Department of Internal Medicine, University of Bonn, Bonn 53105, Germany
2. Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA 92093
3. Department of Internal Medicine, University of Mainz, Mainz 55131, Germany
4. Institute Pasteur, Laboratory of Lymphoid Tissues, Centre National de la Recherche Scientifique URA1961, Paris 75724, France