1. Clinical Research Fellow, Cardiovascular Science, Edinburgh University and Royal Infirmary of Edinburgh, Study performed in the Critical Care Department, Royal Infirmary of Edinburgh
2. Registrar in Anaesthesia and Critical Care, Anaesthesia Department, Royal Infirmary of Edinbugh, Study performed in the Critical Care Department, Royal Infirmary of Edinburgh
3. Consultant in Anaesthesia and Critical Care, Critical Care Department, Royal Infirmary of Edinburgh, Study performed in the Critical Care Department, Royal Infirmary of Edinburgh
4. Consultant in Critical Care, Critical Care Department, Royal Infirmary of Edinburgh, Study performed in the Critical Care Department, Royal Infirmary of Edinburgh