[1] Deutsch Rheumaforsch Zentrum Berlin, D-10115 Berlin, Germany
[2] Washington Univ, Sch Med, Howard Hughes Med Inst, Dept Pathol, St Louis, MO 63110 USA
[3] Washington Univ, Sch Med, Howard Hughes Med Inst, Ctr Immunol, St Louis, MO 63110 USA
[4] German Canc Res Ctr, Bioquantzentrum, D-69120 Heidelberg, Germany