1 Lewis Katz School of Medicine at Temple University, 3401 North Broad Street, 785 Parkinson Pavilion, Philadelphia, PA, 19140, USA. victor.kim@tuhs.temple.edu.
2 Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, MA, USA.
3 Department of Radiology, University of Alabama at Birmingham, Birmingham, AL, USA.
4 Department of Radiology, University of California San Diego, San Diego, CA, USA.