1. Merskey H Bogduk N . Classification of Chronic Pain: Descriptions of Chronic Pain Syndromes and Definitions of Pain Terms, 2nd edition. Seattle, WA: IASP Press; 1994.
2. Engelhardt HT Jr . The Foundations of Bioethics, 2nd edition. New York: Oxford University Press; 1996.
3. An ethnomedical perspective of Anglo-American psychiatry
4. A new deal on disease definition
5. Dorland WAN . Dorland's Illustrated Medical Dictionary, 32nd edition. Philadelphia: WB Saunders Company; 2011.