Fig. (1) Schematic representation of duodenal-jejunal bypass surgery (DJB). Standard DJB surgery was adopted in our study. Duodenum and proximal jejunum (4-5cm distal to the ligament of Treiz) were bypassed. About 4 cm distal to the site of gastrojejunal anastomosis, the side wall of the intestinal was opened and anastomosed to the biliopancreatic limb.