1. Department of Medicine; National Jewish Health; Denver Colorado USA
2. Department of Internal Medicine and Research Institute of Clinical Medicine-Biomedical Research Institute of Chonbuk National University Hospital; Chonbuk National University; Jeonju South Korea
3. Pulmonary and Critical Care Division; Morehouse School of Medicine; Atlanta Georgia USA
4. Channing Division of Network Medicine and Division of Pulmonary and Critical Care Medicine; Brigham and Women's Hospital and Harvard Medical School; Boston Massachusetts USA
5. Division of Pulmonary, Allergy and Critical Care Medicine; University of Alabama at Birmingham; Birmingham Alabama USA
6. Department of Medicine; Johns Hopkins University School of Medicine; Baltimore Maryland USA
7. Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine; University of California; San Diego California USA