1. Department of Orthopaedics, University Clinic Aachen, RWTH Aachen University Clinic, Aachen, Germany
2. Department of Medicine, Surgery and Dentistry, University of Salerno, Baronissi, Italy
3. School of Pharmacy and Bioengineering, Keele University School of Medicine, Thornburrow Drive, Stoke on Trent, England
4. Barts and the London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, Mile End Hospital, Queen Mary University of London, London, England