1. Specialist Registrar, Department of Anaesthesia, Mater Misericordiae University Hospital, Dublin, Ireland.
2. Director, Clinical Research Unit, Mater Misericordiae University Hospital, and Clinical Research Unit, University College Dublin, Dublin, Ireland.
3. Professor, Department of Anaesthesia, Adjunct Clinical Faculty, School of Medicine and Medical Science, University College Dublin, Consultant in Anaesthesia, Mater Misericordiae University Hospital, National Cancer Control Programme, Dublin, Ireland, and the Outcomes Research Consortium, Cleveland Clinic, Cleveland, Ohio.