1. Department of Infection and Tropical Medicine, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
2. Department of Microbiology, University Hospitals of Derby and Burton NHS Foundation Trust, Derby, UK
3. Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Sheffield, UK
4. School of Health and Related Research, Faculty of Medicine, Dentistry and Health, University of Sheffield, Sheffield, UK
5. Laboratory of Biostatistics, School of Medicine, University of Crete, Heraklion, Greece