TAP infiltration: Subjects randomized to the EXPAREL+bupivacaine group (Group 1) will receive a single 20-mL dose of EXPAREL 266 mg expanded in volume with 20 mL normal saline plus 20 mL 0.25% bupivacaine for a total volume of 60 mL, administered as 30 mL (10 mL EXPAREL, 10 mL 0.25% bupivacaine HCl, and 10 mL saline) on each side of the abdomen. Subjects randomized to the active bupivacaine group (Group 2) will receive 20 mL 0.25% bupivacaine expanded in volume with 40 mL normal saline for a total volume of 60 mL, administered as 30 mL (10 mL 0.25% bupivacaine HCl and 20 mL saline) on each side of the abdomen.