1. Department of Nephrology; Fremantle Hospital; University of Western Australia; Perth Western Australia Australia
2. Department of Orthopaedics; Fremantle Hospital; University of Western Australia; Perth Western Australia Australia
3. School of Surgery; University of Western Australia; Perth Western Australia Australia
4. Western Australian Patient Blood Management Program; Health Department of Western Australia; Perth Western Australia Australia
5. Institute of Anaesthesiology; University Hospital Zurich; Zurich Switzerland
6. Centre for Population Health Research; Curtin University; Perth Western Australia Australia
7. School of Medicine and Pharmacology; University of Western Australia; Perth Western Australia Australia