Affiliation: | 1. Department of Surgery,Aberdeen University and Aberdeen Royal Infirmary, Foresterhill,Aberdeen, Scotland, AB25 2ZN, United Kingdom 2. Department of Surgery, Lincoln County Hospital, Lincoln, England, LN2 5QY, United Kingdom 3. Department of Radiology, Aberdeen University and Aberdeen Royal Infirmary, Foresterhill, Aberdeen, Scotland,AB25 2ZN, United Kingdom |