1. Department of Infection and Tropical Medicine, Royal Hallamshire Hospital, Sheffield, UK
2. Department of Microbiology, Royal Derby Hospital, Derby, UK
3. Department of Cardiology, University Hospitals of Derby and Burton NHS Foundation Trust, Burton-on-Trent, UK
4. Sheffield Teaching Hospital NHS Foundation Trust, Sheffield, UK
5. Laboratory of Biostatistics, School of Medicine, University of Crete, Heraklion, Greece
6. School of Health and Related Research, Faculty of Medicine, Dentistry and Health, The University of Sheffield, Sheffield, UK