1. Quality assurance standards for pain relief of acute and cancer pain;American Pain Society Committee on Quality Assurance Standards,1991
2. Improving outcomes of analgesic treatment: is education enough?;Max;Ann Intern Med,1990
3. Acute pain management: Operative or medical procedures and trauma: Clinical Practice Guideline No. 1;Carr,1992
4. Management of cancer pain: Adults: Clinical Practice Guideline No. 9;Jacox,1994
5. Quality improvement guidelines for the treatment of acute and cancer pain;American Pain Society Quality of Care Committee;JAMA,1995