1. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, National Jewish Health, Denver, Colorado, United States
2. Medical Scientist Training Program, Indiana University School of Medicine, Indianapolis, Indiana, United States
3. Department of Immunology and Genomic Medicine, National Jewish Health, Denver, Colorado, United States
4. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Indiana University, Indianapolis, Indiana, United States
5. Department of Anatomy, Cell Biology and Physiology, Indiana University, Indianapolis, Indiana, United States
6. Department of Medicine, Fuzhou First Hospital Affiliated with Fujian Medical University, Fuzhou, Fujian, China
7. Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of Colorado, Anschutz Medical Center, Aurora, Colorado, United States
8. Department of Medicine, Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, Medical University of South Carolina, Charleston, South Carolina, United States