1. MRC Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh University Medical School, Edinburgh, United Kingdom.
2. Division of Immunology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge, CB2 1QP, UK.
3. Université Denis Diderot-Paris 7/Institut Pasteur, Unité de Défense Innée et Inflammation, INSERM U874, Batiment Metchnikoff, Institut Pasteur, 25, rue du Dr Roux, 75724 Paris Cedex, France.