1. Surgical stress: the role of pain and analgesia;Kehlet;Br J Anaesth,1989
2. Acute and postoperative pain;Cousins,1989
3. The challenge of pain;Melzack,1982
4. Pathophysiology of acute pain;Sinatra,1992
5. Acute pain management: operative or medical procedures and trauma;Acute Pain Management Guideline Panel,1992