1. Unconventional medicine in the United States prevalence, costs and patterns of use;Eisenberg;N Eng J Med,1993
2. World Health Organization: Legal status of traditional medicine and complementary/alternative medicine, a worldwide review. Geneva: WHO, WHO/EDM/TRM/2001.2.
3. Trends in alternative medicine use in the United States, 1990–1997: results of a follow-up national survey;Eisenberg;JAMA,1998
4. World Health Organization. Traditional Medicine Strategy 2002–2005. Online document at: http://whqlibdoc.who.int/hq/2002.1.pdf (accessed 27.05.2010).
5. The rise and rise of complementary and alternative medicine: a sociological perspective;Coulter;Med J,2004