1. Department of Clinical Microbiology, Blackpool Victoria Hospital, Blackpool, Lancashire, United Kingdom.
2. Department of Cardiology, Blackpool Victoria Hospital, Blackpool, Lancashire, United Kingdom.
3. Department of Anaesthesiology, Blackpool Victoria Hospital, Blackpool, Lancashire, United Kingdom.
4. Department of Cardiothoracic Anesthesiology, Blackpool Victoria Hospital, Blackpool, Lancashire, United Kingdom.