[1] Univ Hosp No Norway, Dept GI & HPB Surg, Tromso, Norway
[2] Univ Tromso, Inst Clin Med, N-9001 Tromso, Norway
[3] Univ Edinburgh, Royal Infirm Edinburgh, Edinburgh EH8 9YL, Midlothian, Scotland
[4] Univ Hosp Maastricht, Dept Surg, Maastricht, Netherlands
[5] NUTRIM Sch Nutr Toxicol & Metab, Maastricht, Netherlands
[6] Hosp CHU Estaing, Dept Digest Surg, Clermont Ferrand, France
[7] McGill Univ, Ctr Hlth, Dept Anesthesia, Montreal, PQ, Canada
[8] Univ Fed Mato Grosso, Dept Surg, Cuiaba, Brazil
[9] Univ Hosp Lausanne CHUV, Dept Visceral Surg, Lausanne, Switzerland
[10] Univ Nottingham Hosp, Queens Med Ctr, Nottingham Digest Dis Ctr,Natl Inst Hlth Res, Div Gastrointestinal Surg,Biomed Res Unit, Nottingham NG7 2UH, England
[11] San Raffaele Univ, Milan, Italy
[12] Orebro Univ Hosp, Dept Surg, Orebro, Sweden
[13] Karolinska Inst, Dept Mol Med & Surg, Stockholm, Sweden