1. Basson MD, Fielding LP, Bilchick AJ et al. Does vasoactive intestinal polypetyde mediate the pathophysiology of bowel obstruction? Am J Surg 1989; 157: 109–115.
2. Bruera E, Roca E, Cedaro L et al. Action of oral methylprednisolone in terminal cancer patients: a prospective randomized double-blind study. Cancer Treat Rep 1985; 69: 751–760.
3. Cain JM, Stacy L, Jusenius K, Figge D. The quality of dying: financial, psychological, and ethical dilemmas. Obstet Gynecol 1990; 76: 149–152.
4. Cancer Pain Relief and Palliative Care. Report of WHO expert committee. Geneva: WHO, 1990.
5. Five Wishes. Tallahassee: Aging with Dignity, 2000.