Effect of postoperative epidural analgesia on morbidity and mortality following surgery in medicare patients.
Wu CL, Hurley RW, Anderson GF, Herbert R, Rowlingson AJ, Fleisher LA. Effect of postoperative epidural analgesia on morbidity and mortality following surgery in medicare patients. Reg Anesth Pain Med. 2004 Nov-Dec; 29(6):525-33; discussion 515-9.