1. Department of Clinical Microbiology, Royal College of Surgeons in Ireland Education & Research Centre, Beaumont Hospital, Dublin 9, Ireland
2. Department of Medicine, Royal College of Surgeons in Ireland Education & Research Centre, Beaumont Hospital, Dublin 9, Ireland
3. School of Biomolecular & Biomedical Science, University College Dublin, Dublin 4, Ireland
4. Department of Microbiology, Beaumont Hospital, Dublin 9, Ireland