Institution: | 2. Department of Biostatistics and Informatics, Mayo Clinic, Rochester;3. Department of Radiology, Mayo Clinic, Rochester;4. Department of Epidemiology, Mayo Clinic, Rochester;6. Division of Pulmonary and Critical Care Medicine and VAMC, University of Minnesota Medical School, Minneapolis, MN;5. Division of Pulmonary and Critical Care Medicine, University of Minnesota Medical School, Minneapolis, MN |