[1] Gen Hosp Sint Maarten, Dept Abdominal Surg, Rooienberg 25, BE-2570 Duffel Mechelen, Duffel, Belgium
[2] Univ Hosp Leuven, Dept Gen Surg, Campus Gasthuisberg,Herestr 49, BE-3000 Leuven, Belgium
[3] Gen Hosp Sint Maarten, Dept Radiol, Rooienberg 25, BE-2570 Duffel Mechelen, Duffel, Belgium
[4] Univ Hosp Antwerpen, Dept Radiol, Wilrijkstr 10, BE-2650 Edegem, Belgium
[5] Univ Ghent, Fac Med & Hlth Sci, Ghent, Belgium