1. Surgical Outcomes Research Centre (SOuRCe), Royal Prince Alfred Hospital (RPAH), Sydney, NSW 2050, Australia
2. Faculty of Medicine and Health, Central Clinical School, The University of Sydney, Sydney, NSW 2050, Australia
3. Institute of Academic Surgery (IAS), Royal Prince Alfred Hospital (RPAH), Sydney, NSW 2050, Australia
4. Department of Physiotherapy, Faculty of Medicine Dentistry and Health Sciences, The University of Melbourne, Melbourne, VIC 3010, Australia
5. Department of Health Services Research: Allied Health, Peter MacCallum Cancer Centre, Melbourne 3052, Australia
6. Colorectal Department, Royal Prince Alfred Hospital (RPAH), Sydney, NSW 2050, Australia
7. Nutrition and Dietetics Department, Royal Prince Alfred Hospital (RPAH), Sydney, NSW 2050, Australia
8. Neuroscience Research Australia, Sydney, NSW 2031, Australia
9. School of Population Health, University of New South Wales, Kensington, NSW 2052, Australia