1 Department of Colorectal Surgery, John Hunter Hospital, Newcastle, NSW, Australia.
2 Department of Surgery, Aberdeen Royal Infirmary, Scotland.
3 Honorary Senior Clinical Lecturer, University of Aberdeen, Aberdeen, Scotland.
4 Hunter Surgical Clinical Research Unit & Department of Colorectal Surgery, John Hunter Hospital, Newcastle, NSW, Australia.
5 Conjoint Associate Professor, University of Newcastle, Hunter Surgical Clinical Research Unit & Department of Colorectal Surgery, John Hunter Hospital, Newcastle, NSW, Australia.
6 University of Newcastle, Hunter Surgical Clinical Research Unit & Department of Colorectal Surgery, John Hunter Hospital, Newcastle, NSW, Australia.