1. Public Health Laboratory,1
2. Academic Unit of Microbiology and Infectious Diseases, John Radcliffe Hospital,2 and
3. Department of Pathology,3
4. and Bone Infection Unit,4 Nuffield Orthopaedic Centre,
5. Centre for Statistics in Medicine, Institute of Health Sciences,5 Oxford, United Kingdom
6. Nuffield Department of Orthopaedic Surgery,6