1. Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, Connecticut, USA
2. Department of Cellular and Molecular Biology, University of Texas Health Science Center, Tyler, Texas, USA
3. Centre de Recherche du CHUM (CRCHUM), Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Quebec, Canada
4. Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA