1. Center for Pulmonary Imaging Research, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
2. Division of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
3. University of Cincinnati, College of Medicine, Cincinnati, Ohio, USA.
4. Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA.
5. Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
6. Department of Biomedical Engineering, University of Cincinnati, Cincinnati, Ohio, USA.