1. Department of Radiology and
2. Department of Medicine and
3. Department of Epidemiology, Columbia University College of Medicine, New York, New York;
4. Department of Internal Medicine and
5. Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan;
6. Division of Pulmonary and Critical Care Medicine, University of California Los Angeles Medical Center, Los Angeles, California;
7. Department of Medicine, The University of Arizona, Tucson, Arizona;
8. Department of Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa;
9. Department of Physiology, University of California Los Angeles, Los Angeles, California;
10. Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
11. Department of Medicine, The Johns Hopkins University, Baltimore, Maryland;
12. Department of Radiology, National Jewish Health, Denver, Colorado;
13. Department of Medicine, Weill Cornell Medical College, New York, New York;
14. Roy J. Carver Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa;
15. Department of Radiology, University of Utah, Salt Lake City, Utah;
16. Department of Medicine, McGill University, Montreal, Quebec, Canada; and
17. Department of Medicine, University of California San Francisco, San Francisco, California