1. Division of Pulmonary, Critical Care, Sleep and Allergy Medicine, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska;
2. College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska;
3. Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska;
4. Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska;
5. Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Department of Clinical Airway Research, Hannover, Germany;
6. Research Institute at LungClinic Grosshansdorf, Airway Research Center North, Member of the German Center for Lung Research, Grosshansdorf, Germany;
7. Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, Massachusetts; and
8. Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts