1. Johns Hopkins University Bloomberg School of Public Health, 25802, Baltimore, Maryland, United States
2. Johns Hopkins University - Homewood Campus, 1466, Baltimore, Maryland, United States
3. Mayo Clinic, Department of Pulmonary Medicine, Phoenix, Arizona, United States
4. University of California, San Francisco, Pulmonary & Critical Care, San Francisco, California, United States
5. University of Michigan, 1259, Pulmonary/Critical Care, Ann Arbor, Michigan, United States
6. Mayo Clinic, 6915, Internal Medicine, Division of Respiratory Medicine, Scottsdale, Arizona, United States
7. Johns Hopkins University, Environmental Health Sciences, Baltimore, Maryland, United States
8. University of Pittsburgh Graduate School of Public Health, 51303, Environmental and Occupational Health, Pittsburgh, Pennsylvania, United States
9. Johns Hopkins University, Medicine, Division of Pulmonary and Critical Care, Baltimore, Massachusetts, United States;