1. University of Alberta Edmonton Alberta Canada
2. University of Maryland Baltimore Maryland USA
3. Alfred Hospital Lung Transplant Service Melbourne Australia
4. University Hospital Motol Prague Czech Republic
5. Washington University in St Louis St. Louis Missouri USA
6. University of Texas San Antonio San Antonio Texas USA
7. Pomeranian Medical University of Szczecin Szczecin Poland
8. Toronto Lung Transplant Program University Health Network Toronto Ontario Canada
9. Medical University of Vienna Vienna Austria