1. Department of Molecular and Cellular Sport Medicine, German Sport University Cologne, Cologne, Germany
2. Clinic III for Internal Medicine, University of Cologne, Cologne, Germany
3. Clinic I for Internal Medicine, University of Cologne, Cologne, Germany
4. Institute I for Anatomy and Cell Biology, University of Cologne, Cologne, Germany
5. Clinic for Orthopedy, University of Cologne, Cologne, Germany
6. Department of Cardiothoracic Surgery, University of Cologne, Cologne, Germany