1. Centre for Healthcare Education Research and Innovation, University of Aberdeen, Aberdeen, Scotland, UK
2. Department of Colorectal Surgery, Aberdeen Royal Infirmary, Aberdeen, Scotland, UK
3. Intercollegiate Committee for Basic Surgical Examinations, UK
4. Department of Vascular Surgery, Ninewells Hospital, Dundee, Scotland, UK
5. Medical Statistics Team, University of Aberdeen, Aberdeen, Scotland, UK