1. Sydney Orthopaedic Research Institute, Chatswood, NSW, 2046 Australia; Albert Trillat Center, Lyon University Hospital, Lyon 1, France e-mail:
2. Sydney Orthopaedic Research Institute, Chatswood, NSW 2046, Australia
3. Sydney Orthopaedic Research Institute, Chatswood, NSW, 2046 Australia; School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006, Australia
4. Australian School of Advanced Medicine, Macquarie University, NSW 2109, Australia