1. Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI
2. Department of Radiology, The University of Kansas Medical Center, Kansas City, KS
3. Department of Radiology, Portland VA Healthcare System, Oregon Health & Science University, Portland, OR
4. Department of Medicine, National Jewish Health, Denver, CO
5. Department of Radiology, University of Chicago Medicine, Chicago, IL
6. Departments of Radiology & Internal Medicine, University of Michigan Medical School / Michigan Medicine, Ann Arbor, MI
7. Department of Radiology, Imperial College, London, United Kingdom
8. Department of Radiology, National Jewish Health, Denver, CO