1. Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA.
2. Division of Immunology, Transplantation and Infectious Diseases, IRCCS Ospedale San Raffaele, Milan, Italy.
3. Medical Scientist Training Program, School of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA.
4. Lung Biology Center, Department of Medicine, University of California, San Francisco, 1550 4th Street, San Francisco, CA 94158, USA.
5. CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Lyon, France.