5P.Prithvi Raj. Neuropathic pain. Management of Pain, A World Perspective, International Symposium Satellite of 8th Congress of the Pain Clinic. Tokyo Japan, 2000, 7:75~87.
10S. Takada, H. Takahashi, S. Morita, et al. Usefulness of Ketamine in cancer pain management. Management of pain. A World Perspective, Intermational Symposium Satellite of 9th Congress of the Pain Clinic. Tokyo Japan, 2000, 7:205~209.