1. Department of Microbiology, Immunology, & Pathology, Colorado State University, Fort Collins, CO 80523, USA.
2. Division of Cardiothoracic Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
3. Department of Pathology, National Jewish Health, Denver, CO 80206, USA.
4. Department of Pathology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
5. Department of Academic Affairs, National Jewish Health, Denver, CO 80206, USA.
6. Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
7. Department of Radiology, National Jewish Health, Denver, CO 80206, USA.
8. Department of Medicine, National Jewish Health, Denver, CO 80206, USA.
9. Pulmonary Section, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO 80045, USA.