1. Incidence of pain;Twycross;Clin Oncol,1984
2. Management of cancer pain;Bonica;Recent Results Cancer Res,1984
3. The prevalence and severity of pain in cancer;Daut;Cancer,1982
4. Pain management in advanced cancer;Levy;Semin Oncol,1985
5. Psychologic and behavioral aspects of cancer pain;Chapman,1979