[1] Maastricht Univ, Dept Surg, Med Ctr, Maastricht, Netherlands
[2] Cantonal Hosp Olten, Dept Visceral Vasc & Thorac Surg, Olten, Switzerland
[3] Skane Univ Hosp, Dept Surg, Malmo, Sweden
[4] PennState Hershey Med Ctr, Dept Surg, Div Minimally Invas & Bariatr, Hershey, PA USA
[5] Carolinas Med Ctr, Dept Surg, Div Gastrointestinal & Minimally Invas Surg, Charlotte, NC USA
[6] Sykehuset Innlandet Hosp Trust, Dept Surg, Brumunddal, Norway
[7] Ordensklinikum Linz, Dept Surg, Linz, Austria
[8] Cantonal Hosp St Gallen, Dept Urol, St Gallen, Switzerland
[9] Univ Hosp Wuerzburg, Dept Gen Visceral Transplant Vasc & Pediat Surg, Oberduer Str 6, D-97080 Wurzburg, Germany
[10] Maria Middelares Hosp, Dept Surg, Buitenring Sint Denijs 30, B-9000 Ghent, Belgium