1. Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
2. Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, Connecticut, USA
3. Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
4. Pulmonary and Critical Care Division, Department of Medicine, Center for Translational Lung Biology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA
5. Pulmonary and Critical Care Division, Department of Medicine, Lung Biology Institute, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA