1 Department of Clinical Microbiology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK. Electronic address: Anna.Casey@uhb.nhs.uk.
2 Hospital General de Granollers, Universitat Internacional de Catalunya, Barcelona, Spain.
3 Medical Audits Ltd, Dublin, Ireland.
4 Tulane University School of Medicine, New Orleans, LA, USA.
5 Department of Surgery, Duke University Medical, Durham, NC, USA.
6 University Hospital of Poitiers, Poitiers, France.