1. Centre d’Immunologie INSERM-CNRS de Marseille-Luminy, Marseille, France1;
2. Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, Australia2;
3. Department of Biochemistry, University of Geneva, Geneva, Switzerland3; and
4. Departmento de Microbiologia, Universidad de Navarra, Pamplona, Spain4