1. INEB ‐ Instituto de Engenharia Biomédica, Laboratório de Biomateriais, Rua do Campo Alegre, 823, 4150–180 Porto, Portugal
2. FEUP ‐ Faculdade de Engenharia da Universidade do Porto, DEMM, Rua Dr. Roberto Frias, 4200–465 Porto, Portugal
3. Orthopaedic Research Unit, Box 180, Addenbrooke's Hospital, Hills Road, Cambridge CB2 2QQ, United Kingdom
4. Clinical Biochemistry, Addenbrooke's Hospital, Hills Road, Cambridge CB2 2QQ, United Kingdom
5. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, United Kingdom