1. Department of General Medicine, Calvary Mater Hospital, Waratah, Australia
2. Department of Anaesthesia, John Hunter Hospital, New Lambton Heights, Australia
3. John Hunter Hospital, New Lambton Heights, Australia
4. Department of Cardiology, John Hunter Hospital, New Lambton Heights, Australia
5. Hunter Medical Research Institute, New Lambton Heights, Australia
6. NSW Agency for Clinical Innovation, North Ryde, Australia