1. Department of Anaesthesia, Mercy Hospital for Women, Heidelberg, Victoria
2. Department of Anaesthesia, Mercy Hospital for Women, Heidelberg, University of Melbourne, Parkville, Victoria
3. Department of Women's Anaesthesia, Women's and Children's Hospital, North Adelaide, South Australia and Clinical Senior Lecturer, Discipline of Acute Care Medicine, University of Adelaide, Adelaide, South Australia
4. Midwifery Professorial Unit, La Trobe University, Mercy Hospital for Women, Heidelberg, Victoria