1 Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
2 Division of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
3 Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
4 Division of Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
5 Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
6 Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. robert.fleck@cchmc.org.
7 Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. robert.fleck@cchmc.org.
8 Department of Radiology, University of Cincinnati College of Medicine, 3333 Burnet Ave., ML 5031, Cincinnati, OH, 45229, USA. robert.fleck@cchmc.org.