[Table 3.5.c.1] Yearly trend of preoperative biliary drainage [Table 3.5.c.2] Locus of primary tumor and preoperative biliary drainage [Table 3.5.c.3] Preoperative biliary drainage according to the serum total bilirubin [Table 3.5.c.4] Yearly trend of methods of preoperative biliary drainage [Figure 3.5.c.5] Decrease of total bilirubin after biliary drainage in pancreatectomy cases [Figure 3.5.c.6] Distribution of total bilirubin before and after drainage in pancreatectomy cases