1. Russell H. Morgan Department of Radiology and Radiological SciencesJohns Hopkins University School of MedicineBaltimoreMarylandUSA
2. Division of Pulmonary and Critical Care MedicineDepartment of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
3. Department of RadiologyHannover Medical SchoolHannoverGermany
4. Radiology and Imaging SciencesNational Institute of Health Clinical CenterBethesdaMarylandUSA
5. Richard DeVos Heart and Lung Transplant ClinicGrand RapidsMichiganUSA