1. Unconventional medicine in the United States: prevalence, costs, and patterns of use;Eisenberg;N Engl J Med,1993
2. Alternative medicine: expanding medical horizons—a report to the NIH on alternative medical systems and practices in the United States,1995
3. Fact sheet #3: classification of alternative medical practices,1994
4. Rosenthal Center for Complementary and Alternative Medicine. Information sheet; what is complementary and alternative medicine. New York: The Center (http://cpmcnet.columbia.edu/dept/rosenthal/cancer/info/whatis.html).
5. Office of Alternative Medicine Home Page, Core CAM Presentations, slide #8: What is CAM? (http://altmed.od.nih.gov/oam/resources/present/cam-core/).