1. Department of Mechanical Engineering, The University of Iowa, Iowa City, Iowa.
2. IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa.
3. School of Mechanical Engineering, Kyungpook National University, Daegu, Republic of Korea.
4. Department of Radiology, The University of Iowa, Iowa City, Iowa.
5. Department of Occupational and Environmental Health, The University of Iowa, Iowa City, Iowa.
6. Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
7. Departments of Internal Medicine and Pediatrics, Washington University School of Medicine, St. Louis, Missouri.
8. Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin.
9. Department of Radiology, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin.
10. Division of Pulmonary Medicine and Critical Care, Department of Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin.
11. Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland.