Chapman CR, Foley KM, eds. Changing concepts of tolerance to opioids. What the cancer patient has taught us. Current and emerging issues in cancer pain: research practice. New York: Raven Press, 1993: 331-50.
2.
Bruera E., Pereira J., Watanabe S.et al.Opioid rotation in patients with cancer pain. A retrospective comparison of dose ratios between methadone, hydromorphone, and morphine. Cancer1996; 78: 852-57.
3.
Crews JC, Sweeney NJ, Denson DDClinical efficacy of methadone in patients refractory to other mu-opioid receptor agonist analgesics for management of terminal cancer pain. Case presentations and discussion of incomplete cross-tolerance among opioid agonist analgesics. Cancer1993; 72: 2266-72.
4.
Fallon M., Hanks Gwc.Opioid resistant pain in cancer: sense or nonsense. The Pain Clinic1993; 6: 205-206.
5.
Galer BS, Coyle N., Pasternak GW, Portenoy RKIndividual variability in the response to different opioids: report of five cases. Pain1992; 49: 87-91.