1. Department of Orthopaedics, University Clinic Aachen, RWTH Aachen University Clinic, Aachen, Germany
2. Department of Cardiac and Thoracic Surgery, University Clinic Aachen, RWTH Aachen University Clinic, Aachen, Germany
3. Department of Medicine, Surgery and Dentistry, University of Salerno, Baronissi (SA), Italy
4. Queen Mary University of London, Barts and London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, London, UK
5. School of Pharmacy and Bioengineering, Keele University Faculty of Medicine, Stoke on Trent, UK