1. UAB Lung Imaging Core
2. UAB Lung Health Center
3. Division of Pulmonary, Allergy and Critical Care Medicine, and
4. Department of Electrical and Computer Engineering, University of Alabama at Birmingham, Birmingham, Alabama
5. Department of Radiology, University of California, San Diego, La Jolla, California
6. Thirona, Nijmegen, the Netherlands; and
7. Department of Biomedical Engineering, University of Iowa, Iowa City, Iowa