1. Centre for Cell Engineering; Joseph Black Building; University of Glasgow; Glasgow G12 8QQ UK
2. Biomaterials Engineering Group; School of Oral and Dental Sciences; University of Bristol; Lower Maudlin Street Bristol BS1 2LY UK
3. Department of Orthopaedics and Traumatology; Li Ka Shing Institute of Health Sciences; The Chinese University of Hong Kong; Prince of Wales Hospital Hong Kong P. R. China
4. The Chinese University of Hong Kong Shenzhen Research Institute; Shenzhen P. R. China
5. Department of Orthopaedic Surgery; Southern Medical University; Southern Hospital; Guangzhou P. R. China
6. Department of Orthopaedics and Trauma; Southern General Hospital; Glasgow G51 4TF UK