1. Internal Medicine VII, Sports Medicine, University Hospital Heidelberg, Germany.
2. Medbase Sports Medical Center Zurich, Zurich, Switzerland.
3. Internal Medicine III, Cardiology, University Hospital Heidelberg, Germany.
4. Department of Anatomy and Cell Biology, University of Marburg, Germany.
5. Department of Radiology, Kantonsspital Chur, Switzerland.
6. Department of Radiology, Inselspital, University Hospital Bern, Switzerland.
7. Intensive Care Medicine, University Hospital Zurich, Switzerland.
8. Center for Pulmonary Hypertension, Thoraxclinic Heidelberg, Germany.