1. Breakthrough pain;Portenoy;Oncology (Huntingt),1989
2. Breakthrough pain;Portenoy;Pain,1990
3. Incident pain;McQuay;Cancer Surv,1994
4. Portenoy RK. Treatment of temporal variations in chronic cancer pain. Semin Oncol 1997;24:S16-7–S16-12.
5. Opioid use in chronic pain;McQuay;Acta Anaesth Scand,1997