1. Chronic pain: A new disease?;Brookoff;Hosp Pract,2000
2. Opioid analgesics;Gutstein,2001
3. Problems of overarching importance, which transcend organ systems;Foley,1996
4. Principles of Analgesic Use in the Treatment of Acute Pain and Cancer Pain,1999
5. The nature of opioid responsiveness and its implications for neuropathic pain: new hypotheses derived from studies of opioid infusions;Portenoy;Pain,1990