1. Deutsches Rheuma Forschungszentrum (DRFZ); a Leibniz Institute; Charitéplatz 1 D-10117 Berlin Germany
2. MRC Centre for Immune Regulation, School of Immunity and Infection; University of Birmingham; Birmingham B15 2TT United Kingdom
3. Charité Universitätsmedizin; Charitéplatz 1 D-10117 Berlin Germany