iNKT cells were expanded from third-party PBMC with some minor modifications as previously described (Online Supplementary Appendix).13 (link) Culture-expanded iNKT cells were purified with antiiNKT MicroBeads (Miltenyi Biotech, Bergisch Gladbach, Germany). Alternatively, iNKT cells were stained with DAPI (4',6- diamidino-2-phenylindole, Merck, Darmstadt, Germany), anti- CD3, anti-CD4, anti-CD8 antibodies and PBS57-loaded CD1d tetramer allowing for enrichment of iNKT cells and their different subsets by fluorescence-activated cell sorting (FACS).