1. Department of Orthopaedic , Trauma, and Reconstructive Surgery, , 52074 Aachen , Germany
2. RWTH University Hospital , Trauma, and Reconstructive Surgery, , 52074 Aachen , Germany
3. Department of Orthopaedics and Trauma Surgery, Academic Hospital of Bolzano (SABES-ASDAA) , 39100 Bolzano , Italy
4. Department of Medicine , Surgery and Dentistry, , 84081 Baronissi, SA , Italy
5. University of Salerno , Surgery and Dentistry, , 84081 Baronissi, SA , Italy
6. Department of Orthopaedic and Trauma Surgery, Eifelklinik St.Brigida , 52152 Simmerath , Germany
7. School of Pharmacy and Bioengineering, Keele University Faculty of Medicine , ST4 7QB Stoke on Trent, England
8. Barts and the London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, Mile End Hospital, Queen Mar y University of London , 275 Bancroft Road, London E1 4DG , UK