[Table 3.8.a.1] Yearly trend of postoperative complications after resection of the tumor in the pancreatic head (With overlap) [Table 3.8.a.2] Postoperative complications by major procedures after resection of the tumor in the pancreatic head (Procedures that were performed more than 10 cases in four years. With overlap between each complication) [Table 3.8.a.3] Postoperative complications by combined resection for tumor in the pancreatic head (With overlap) [Table 3.8.a.4] Postoperative …