1. Department of Radiology and the Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.
2. Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine, Korea.
3. Department of Radiology, Vancouver Hospital and the Health Sciences Center, University of British Columbia, Vancouver, BC, Canada.
4. Division of Respiratory and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.
5. Department of Diagnostic Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Korea.
6. Department of Pathology, Mayo Clinic Scottsdale, Scottsdale AZ, USA.
7. Biostatistics Unit, Samsung Medical Center, Korea.