1. University of Glasgow Dental School; Glasgow; UK
2. Department of Anaesthesia; Gartnavel General Hospital; Glasgow; UK
3. Department of Anaesthesia; Forth Valley Royal Hospital; Larbert; UK
4. Department of Anaesthesia; Foothills Medical Centre; Calgary; Canada
5. Quality Unit; Scottish Government; Edinburgh; UK
6. Liverpool University Dental Hospital; UK
7. University of Glasgow Department of Anaesthesia; Glasgow Royal Infirmary; UK