1. Division of Pulmonary and Critical Care Medicine
2. Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
3. Pulmonary and Critical Care Medicine Section, Medical Service, and
4. Division of Pulmonary and Critical Care Medicine, University of California Los Angeles Medical Center, Los Angeles, California
5. Division of Pulmonary and Critical Care Medicine, University of Utah, Salt Lake City, Utah
6. Division of Pulmonary and Critical Care Medicine, Veterans Affairs Medical Center, Salt Lake City, Utah
7. Division of Pulmonary and Critical Care Medicine, University of California San Francisco, San Francisco, California
8. Division of Pulmonary and Critical Care Medicine, Wake Forest University, Winston-Salem, North Carolina
9. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University, Baltimore, Maryland
10. Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University, New York, New York
11. Department of Thoracic Medicine and Surgery, Temple University School of Medicine, Philadelphia, Pennsylvania
12. Department of Radiology, and
13. Department of Radiology and Biomedical Engineering, University of Iowa, Iowa City, Iowa; and
14. Center for Molecular Imaging, University of Michigan, Ann Arbor, Michigan
15. Geriatric Research and Education Clinical Center, VA Ann Arbor Healthcare System, Ann Arbor, Michigan
16. Department of Family Medicine, University of Michigan Health System, Ann Arbor, Michigan