1. Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity; and Department of Anatomy and Neuroscience; The University of Melbourne, Parkville, Victoria 3010, Australia
2. Department of Pathology and Immunology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
3. Cancer Immunology Research Program, Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia
4. Department of Biochemistry and Molecular Biology, School of Biomedical Sciences; and Australian Research Council Centre of Excellence in Structural and Functional Microbial Genomics; Monash University, Clayton, Victoria 3800, Australia
5. Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia
6. Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, Wales, UK