1. Immunology and Microbiology Department, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
2. Gundersen Health System, La Crosse, Wisconsin, USA
3. Department of Pathology and Division of Pulmonary Sciences and Critical Care Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
4. Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado